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python/pyspark/sql/dataframe.py
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DataFrame._jseq
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def _jseq(self, cols, converter=None):
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def _jseq(self, cols, converter=None):
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apache/spark
|
python/pyspark/sql/functions.py
|
last
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def last(col, ignorenulls=False):
"""Aggregate function: returns the last value in a group.
The function by default returns the last values it sees. It will return the last non-null
value it sees when ignoreNulls is set to true. If all values are null, then null is returned.
.. note:: The function is non-deterministic because its results depends on order of rows
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"""
sc = SparkContext._active_spark_context
jc = sc._jvm.functions.last(_to_java_column(col), ignorenulls)
return Column(jc)
|
python
|
def last(col, ignorenulls=False):
"""Aggregate function: returns the last value in a group.
The function by default returns the last values it sees. It will return the last non-null
value it sees when ignoreNulls is set to true. If all values are null, then null is returned.
.. note:: The function is non-deterministic because its results depends on order of rows
which may be non-deterministic after a shuffle.
"""
sc = SparkContext._active_spark_context
jc = sc._jvm.functions.last(_to_java_column(col), ignorenulls)
return Column(jc)
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L527-L538
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train
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Aggregate function that returns the last value in a group.
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pandas-dev/pandas
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pandas/core/groupby/groupby.py
|
GroupBy._fill
|
def _fill(self, direction, limit=None):
"""
Shared function for `pad` and `backfill` to call Cython method.
Parameters
----------
direction : {'ffill', 'bfill'}
Direction passed to underlying Cython function. `bfill` will cause
values to be filled backwards. `ffill` and any other values will
default to a forward fill
limit : int, default None
Maximum number of consecutive values to fill. If `None`, this
method will convert to -1 prior to passing to Cython
Returns
-------
`Series` or `DataFrame` with filled values
See Also
--------
pad
backfill
"""
# Need int value for Cython
if limit is None:
limit = -1
return self._get_cythonized_result('group_fillna_indexer',
self.grouper, needs_mask=True,
cython_dtype=np.int64,
result_is_index=True,
direction=direction, limit=limit)
|
python
|
def _fill(self, direction, limit=None):
"""
Shared function for `pad` and `backfill` to call Cython method.
Parameters
----------
direction : {'ffill', 'bfill'}
Direction passed to underlying Cython function. `bfill` will cause
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default to a forward fill
limit : int, default None
Maximum number of consecutive values to fill. If `None`, this
method will convert to -1 prior to passing to Cython
Returns
-------
`Series` or `DataFrame` with filled values
See Also
--------
pad
backfill
"""
# Need int value for Cython
if limit is None:
limit = -1
return self._get_cythonized_result('group_fillna_indexer',
self.grouper, needs_mask=True,
cython_dtype=np.int64,
result_is_index=True,
direction=direction, limit=limit)
|
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Direction passed to underlying Cython function. `bfill` will cause
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limit : int, default None
Maximum number of consecutive values to fill. If `None`, this
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`Series` or `DataFrame` with filled values
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pad
backfill
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[
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/groupby/groupby.py#L1474-L1505
|
train
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Returns a Series or DataFrame with filled values for the specified order.
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pandas-dev/pandas
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pandas/core/indexes/base.py
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_trim_front
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def _trim_front(strings):
"""
Trims zeros and decimal points.
"""
trimmed = strings
while len(strings) > 0 and all(x[0] == ' ' for x in trimmed):
trimmed = [x[1:] for x in trimmed]
return trimmed
|
python
|
def _trim_front(strings):
"""
Trims zeros and decimal points.
"""
trimmed = strings
while len(strings) > 0 and all(x[0] == ' ' for x in trimmed):
trimmed = [x[1:] for x in trimmed]
return trimmed
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L5393-L5400
|
train
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apache/spark
|
dev/merge_spark_pr.py
|
choose_jira_assignee
|
def choose_jira_assignee(issue, asf_jira):
"""
Prompt the user to choose who to assign the issue to in jira, given a list of candidates,
including the original reporter and all commentors
"""
while True:
try:
reporter = issue.fields.reporter
commentors = map(lambda x: x.author, issue.fields.comment.comments)
candidates = set(commentors)
candidates.add(reporter)
candidates = list(candidates)
print("JIRA is unassigned, choose assignee")
for idx, author in enumerate(candidates):
if author.key == "apachespark":
continue
annotations = ["Reporter"] if author == reporter else []
if author in commentors:
annotations.append("Commentor")
print("[%d] %s (%s)" % (idx, author.displayName, ",".join(annotations)))
raw_assignee = input(
"Enter number of user, or userid, to assign to (blank to leave unassigned):")
if raw_assignee == "":
return None
else:
try:
id = int(raw_assignee)
assignee = candidates[id]
except:
# assume it's a user id, and try to assign (might fail, we just prompt again)
assignee = asf_jira.user(raw_assignee)
asf_jira.assign_issue(issue.key, assignee.key)
return assignee
except KeyboardInterrupt:
raise
except:
traceback.print_exc()
print("Error assigning JIRA, try again (or leave blank and fix manually)")
|
python
|
def choose_jira_assignee(issue, asf_jira):
"""
Prompt the user to choose who to assign the issue to in jira, given a list of candidates,
including the original reporter and all commentors
"""
while True:
try:
reporter = issue.fields.reporter
commentors = map(lambda x: x.author, issue.fields.comment.comments)
candidates = set(commentors)
candidates.add(reporter)
candidates = list(candidates)
print("JIRA is unassigned, choose assignee")
for idx, author in enumerate(candidates):
if author.key == "apachespark":
continue
annotations = ["Reporter"] if author == reporter else []
if author in commentors:
annotations.append("Commentor")
print("[%d] %s (%s)" % (idx, author.displayName, ",".join(annotations)))
raw_assignee = input(
"Enter number of user, or userid, to assign to (blank to leave unassigned):")
if raw_assignee == "":
return None
else:
try:
id = int(raw_assignee)
assignee = candidates[id]
except:
# assume it's a user id, and try to assign (might fail, we just prompt again)
assignee = asf_jira.user(raw_assignee)
asf_jira.assign_issue(issue.key, assignee.key)
return assignee
except KeyboardInterrupt:
raise
except:
traceback.print_exc()
print("Error assigning JIRA, try again (or leave blank and fix manually)")
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/dev/merge_spark_pr.py#L325-L362
|
train
|
Prompt the user to assign the issue to in jira.
|
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apache/spark
|
python/pyspark/sql/readwriter.py
|
DataFrameReader.options
|
def options(self, **options):
"""Adds input options for the underlying data source.
You can set the following option(s) for reading files:
* ``timeZone``: sets the string that indicates a timezone to be used to parse timestamps
in the JSON/CSV datasources or partition values.
If it isn't set, it uses the default value, session local timezone.
"""
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pandas-dev/pandas
|
pandas/core/indexes/base.py
|
Index.rename
|
def rename(self, name, inplace=False):
"""
Alter Index or MultiIndex name.
Able to set new names without level. Defaults to returning new index.
Length of names must match number of levels in MultiIndex.
Parameters
----------
name : label or list of labels
Name(s) to set.
inplace : boolean, default False
Modifies the object directly, instead of creating a new Index or
MultiIndex.
Returns
-------
Index
The same type as the caller or None if inplace is True.
See Also
--------
Index.set_names : Able to set new names partially and by level.
Examples
--------
>>> idx = pd.Index(['A', 'C', 'A', 'B'], name='score')
>>> idx.rename('grade')
Index(['A', 'C', 'A', 'B'], dtype='object', name='grade')
>>> idx = pd.MultiIndex.from_product([['python', 'cobra'],
... [2018, 2019]],
... names=['kind', 'year'])
>>> idx
MultiIndex(levels=[['cobra', 'python'], [2018, 2019]],
codes=[[1, 1, 0, 0], [0, 1, 0, 1]],
names=['kind', 'year'])
>>> idx.rename(['species', 'year'])
MultiIndex(levels=[['cobra', 'python'], [2018, 2019]],
codes=[[1, 1, 0, 0], [0, 1, 0, 1]],
names=['species', 'year'])
>>> idx.rename('species')
Traceback (most recent call last):
TypeError: Must pass list-like as `names`.
"""
return self.set_names([name], inplace=inplace)
|
python
|
def rename(self, name, inplace=False):
"""
Alter Index or MultiIndex name.
Able to set new names without level. Defaults to returning new index.
Length of names must match number of levels in MultiIndex.
Parameters
----------
name : label or list of labels
Name(s) to set.
inplace : boolean, default False
Modifies the object directly, instead of creating a new Index or
MultiIndex.
Returns
-------
Index
The same type as the caller or None if inplace is True.
See Also
--------
Index.set_names : Able to set new names partially and by level.
Examples
--------
>>> idx = pd.Index(['A', 'C', 'A', 'B'], name='score')
>>> idx.rename('grade')
Index(['A', 'C', 'A', 'B'], dtype='object', name='grade')
>>> idx = pd.MultiIndex.from_product([['python', 'cobra'],
... [2018, 2019]],
... names=['kind', 'year'])
>>> idx
MultiIndex(levels=[['cobra', 'python'], [2018, 2019]],
codes=[[1, 1, 0, 0], [0, 1, 0, 1]],
names=['kind', 'year'])
>>> idx.rename(['species', 'year'])
MultiIndex(levels=[['cobra', 'python'], [2018, 2019]],
codes=[[1, 1, 0, 0], [0, 1, 0, 1]],
names=['species', 'year'])
>>> idx.rename('species')
Traceback (most recent call last):
TypeError: Must pass list-like as `names`.
"""
return self.set_names([name], inplace=inplace)
|
[
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"rename",
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"self",
",",
"name",
",",
"inplace",
"=",
"False",
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":",
"return",
"self",
".",
"set_names",
"(",
"[",
"name",
"]",
",",
"inplace",
"=",
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")"
] |
Alter Index or MultiIndex name.
Able to set new names without level. Defaults to returning new index.
Length of names must match number of levels in MultiIndex.
Parameters
----------
name : label or list of labels
Name(s) to set.
inplace : boolean, default False
Modifies the object directly, instead of creating a new Index or
MultiIndex.
Returns
-------
Index
The same type as the caller or None if inplace is True.
See Also
--------
Index.set_names : Able to set new names partially and by level.
Examples
--------
>>> idx = pd.Index(['A', 'C', 'A', 'B'], name='score')
>>> idx.rename('grade')
Index(['A', 'C', 'A', 'B'], dtype='object', name='grade')
>>> idx = pd.MultiIndex.from_product([['python', 'cobra'],
... [2018, 2019]],
... names=['kind', 'year'])
>>> idx
MultiIndex(levels=[['cobra', 'python'], [2018, 2019]],
codes=[[1, 1, 0, 0], [0, 1, 0, 1]],
names=['kind', 'year'])
>>> idx.rename(['species', 'year'])
MultiIndex(levels=[['cobra', 'python'], [2018, 2019]],
codes=[[1, 1, 0, 0], [0, 1, 0, 1]],
names=['species', 'year'])
>>> idx.rename('species')
Traceback (most recent call last):
TypeError: Must pass list-like as `names`.
|
[
"Alter",
"Index",
"or",
"MultiIndex",
"name",
"."
] |
9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L1342-L1387
|
train
|
A method to set the names of the current index or MultiIndex.
|
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pandas-dev/pandas
|
pandas/core/indexes/base.py
|
Index.get_indexer_for
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def get_indexer_for(self, target, **kwargs):
"""
Guaranteed return of an indexer even when non-unique.
This dispatches to get_indexer or get_indexer_nonunique
as appropriate.
"""
if self.is_unique:
return self.get_indexer(target, **kwargs)
indexer, _ = self.get_indexer_non_unique(target, **kwargs)
return indexer
|
python
|
def get_indexer_for(self, target, **kwargs):
"""
Guaranteed return of an indexer even when non-unique.
This dispatches to get_indexer or get_indexer_nonunique
as appropriate.
"""
if self.is_unique:
return self.get_indexer(target, **kwargs)
indexer, _ = self.get_indexer_non_unique(target, **kwargs)
return indexer
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L4440-L4450
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train
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python/pyspark/sql/types.py
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UserDefinedType._cachedSqlType
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def _cachedSqlType(cls):
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/types.py#L675-L681
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train
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pandas-dev/pandas
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pandas/core/dtypes/inference.py
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is_sequence
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def is_sequence(obj):
"""
Check if the object is a sequence of objects.
String types are not included as sequences here.
Parameters
----------
obj : The object to check
Returns
-------
is_sequence : bool
Whether `obj` is a sequence of objects.
Examples
--------
>>> l = [1, 2, 3]
>>>
>>> is_sequence(l)
True
>>> is_sequence(iter(l))
False
"""
try:
iter(obj) # Can iterate over it.
len(obj) # Has a length associated with it.
return not isinstance(obj, (str, bytes))
except (TypeError, AttributeError):
return False
|
python
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def is_sequence(obj):
"""
Check if the object is a sequence of objects.
String types are not included as sequences here.
Parameters
----------
obj : The object to check
Returns
-------
is_sequence : bool
Whether `obj` is a sequence of objects.
Examples
--------
>>> l = [1, 2, 3]
>>>
>>> is_sequence(l)
True
>>> is_sequence(iter(l))
False
"""
try:
iter(obj) # Can iterate over it.
len(obj) # Has a length associated with it.
return not isinstance(obj, (str, bytes))
except (TypeError, AttributeError):
return False
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/dtypes/inference.py#L462-L491
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train
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pandas-dev/pandas
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pandas/core/missing.py
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_cast_values_for_fillna
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def _cast_values_for_fillna(values, dtype):
"""
Cast values to a dtype that algos.pad and algos.backfill can handle.
"""
# TODO: for int-dtypes we make a copy, but for everything else this
# alters the values in-place. Is this intentional?
if (is_datetime64_dtype(dtype) or is_datetime64tz_dtype(dtype) or
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values = values.view(np.int64)
elif is_integer_dtype(values):
# NB: this check needs to come after the datetime64 check above
values = ensure_float64(values)
return values
|
python
|
def _cast_values_for_fillna(values, dtype):
"""
Cast values to a dtype that algos.pad and algos.backfill can handle.
"""
# TODO: for int-dtypes we make a copy, but for everything else this
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values = values.view(np.int64)
elif is_integer_dtype(values):
# NB: this check needs to come after the datetime64 check above
values = ensure_float64(values)
return values
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/missing.py#L445-L460
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train
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Cast values to a dtype that algos. pad and algos. backfill can handle.
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pandas-dev/pandas
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pandas/core/indexes/base.py
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Index.is_
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def is_(self, other):
"""
More flexible, faster check like ``is`` but that works through views.
Note: this is *not* the same as ``Index.identical()``, which checks
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Parameters
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other : object
other object to compare against.
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True if both have same underlying data, False otherwise : bool
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# use something other than None to be clearer
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|
python
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def is_(self, other):
"""
More flexible, faster check like ``is`` but that works through views.
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Parameters
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other : object
other object to compare against.
Returns
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True if both have same underlying data, False otherwise : bool
"""
# use something other than None to be clearer
return self._id is getattr(
other, '_id', Ellipsis) and self._id is not None
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L614-L632
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train
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pandas-dev/pandas
|
pandas/core/window.py
|
Rolling._validate_freq
|
def _validate_freq(self):
"""
Validate & return window frequency.
"""
from pandas.tseries.frequencies import to_offset
try:
return to_offset(self.window)
except (TypeError, ValueError):
raise ValueError("passed window {0} is not "
"compatible with a datetimelike "
"index".format(self.window))
|
python
|
def _validate_freq(self):
"""
Validate & return window frequency.
"""
from pandas.tseries.frequencies import to_offset
try:
return to_offset(self.window)
except (TypeError, ValueError):
raise ValueError("passed window {0} is not "
"compatible with a datetimelike "
"index".format(self.window))
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/window.py#L1611-L1621
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train
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Validate & return window frequency.
|
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apache/spark
|
python/pyspark/mllib/linalg/distributed.py
|
IndexedRowMatrix.toBlockMatrix
|
def toBlockMatrix(self, rowsPerBlock=1024, colsPerBlock=1024):
"""
Convert this matrix to a BlockMatrix.
:param rowsPerBlock: Number of rows that make up each block.
The blocks forming the final rows are not
required to have the given number of rows.
:param colsPerBlock: Number of columns that make up each block.
The blocks forming the final columns are not
required to have the given number of columns.
>>> rows = sc.parallelize([IndexedRow(0, [1, 2, 3]),
... IndexedRow(6, [4, 5, 6])])
>>> mat = IndexedRowMatrix(rows).toBlockMatrix()
>>> # This IndexedRowMatrix will have 7 effective rows, due to
>>> # the highest row index being 6, and the ensuing
>>> # BlockMatrix will have 7 rows as well.
>>> print(mat.numRows())
7
>>> print(mat.numCols())
3
"""
java_block_matrix = self._java_matrix_wrapper.call("toBlockMatrix",
rowsPerBlock,
colsPerBlock)
return BlockMatrix(java_block_matrix, rowsPerBlock, colsPerBlock)
|
python
|
def toBlockMatrix(self, rowsPerBlock=1024, colsPerBlock=1024):
"""
Convert this matrix to a BlockMatrix.
:param rowsPerBlock: Number of rows that make up each block.
The blocks forming the final rows are not
required to have the given number of rows.
:param colsPerBlock: Number of columns that make up each block.
The blocks forming the final columns are not
required to have the given number of columns.
>>> rows = sc.parallelize([IndexedRow(0, [1, 2, 3]),
... IndexedRow(6, [4, 5, 6])])
>>> mat = IndexedRowMatrix(rows).toBlockMatrix()
>>> # This IndexedRowMatrix will have 7 effective rows, due to
>>> # the highest row index being 6, and the ensuing
>>> # BlockMatrix will have 7 rows as well.
>>> print(mat.numRows())
7
>>> print(mat.numCols())
3
"""
java_block_matrix = self._java_matrix_wrapper.call("toBlockMatrix",
rowsPerBlock,
colsPerBlock)
return BlockMatrix(java_block_matrix, rowsPerBlock, colsPerBlock)
|
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Convert this matrix to a BlockMatrix.
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required to have the given number of rows.
:param colsPerBlock: Number of columns that make up each block.
The blocks forming the final columns are not
required to have the given number of columns.
>>> rows = sc.parallelize([IndexedRow(0, [1, 2, 3]),
... IndexedRow(6, [4, 5, 6])])
>>> mat = IndexedRowMatrix(rows).toBlockMatrix()
>>> # This IndexedRowMatrix will have 7 effective rows, due to
>>> # the highest row index being 6, and the ensuing
>>> # BlockMatrix will have 7 rows as well.
>>> print(mat.numRows())
7
>>> print(mat.numCols())
3
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/mllib/linalg/distributed.py#L631-L658
|
train
|
Convert this matrix to a BlockMatrix.
|
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pandas-dev/pandas
|
pandas/core/indexes/base.py
|
Index.insert
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def insert(self, loc, item):
"""
Make new Index inserting new item at location.
Follows Python list.append semantics for negative values.
Parameters
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loc : int
item : object
Returns
-------
new_index : Index
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item = self._coerce_scalar_to_index(item)._ndarray_values
idx = np.concatenate((_self[:loc], item, _self[loc:]))
return self._shallow_copy_with_infer(idx)
|
python
|
def insert(self, loc, item):
"""
Make new Index inserting new item at location.
Follows Python list.append semantics for negative values.
Parameters
----------
loc : int
item : object
Returns
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new_index : Index
"""
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item = self._coerce_scalar_to_index(item)._ndarray_values
idx = np.concatenate((_self[:loc], item, _self[loc:]))
return self._shallow_copy_with_infer(idx)
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L4925-L4943
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train
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python/pyspark/profiler.py
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ProfilerCollector.dump_profiles
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def dump_profiles(self, path):
""" Dump the profile stats into directory `path` """
for id, profiler, _ in self.profilers:
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self.profilers = []
|
python
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def dump_profiles(self, path):
""" Dump the profile stats into directory `path` """
for id, profiler, _ in self.profilers:
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self.profilers = []
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/profiler.py#L53-L57
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train
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Dump the profile stats into a directory path.
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apache/spark
|
python/pyspark/sql/dataframe.py
|
DataFrame.unionByName
|
def unionByName(self, other):
""" Returns a new :class:`DataFrame` containing union of rows in this and another frame.
This is different from both `UNION ALL` and `UNION DISTINCT` in SQL. To do a SQL-style set
union (that does deduplication of elements), use this function followed by :func:`distinct`.
The difference between this function and :func:`union` is that this function
resolves columns by name (not by position):
>>> df1 = spark.createDataFrame([[1, 2, 3]], ["col0", "col1", "col2"])
>>> df2 = spark.createDataFrame([[4, 5, 6]], ["col1", "col2", "col0"])
>>> df1.unionByName(df2).show()
+----+----+----+
|col0|col1|col2|
+----+----+----+
| 1| 2| 3|
| 6| 4| 5|
+----+----+----+
"""
return DataFrame(self._jdf.unionByName(other._jdf), self.sql_ctx)
|
python
|
def unionByName(self, other):
""" Returns a new :class:`DataFrame` containing union of rows in this and another frame.
This is different from both `UNION ALL` and `UNION DISTINCT` in SQL. To do a SQL-style set
union (that does deduplication of elements), use this function followed by :func:`distinct`.
The difference between this function and :func:`union` is that this function
resolves columns by name (not by position):
>>> df1 = spark.createDataFrame([[1, 2, 3]], ["col0", "col1", "col2"])
>>> df2 = spark.createDataFrame([[4, 5, 6]], ["col1", "col2", "col0"])
>>> df1.unionByName(df2).show()
+----+----+----+
|col0|col1|col2|
+----+----+----+
| 1| 2| 3|
| 6| 4| 5|
+----+----+----+
"""
return DataFrame(self._jdf.unionByName(other._jdf), self.sql_ctx)
|
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Returns a new :class:`DataFrame` containing union of rows in this and another frame.
This is different from both `UNION ALL` and `UNION DISTINCT` in SQL. To do a SQL-style set
union (that does deduplication of elements), use this function followed by :func:`distinct`.
The difference between this function and :func:`union` is that this function
resolves columns by name (not by position):
>>> df1 = spark.createDataFrame([[1, 2, 3]], ["col0", "col1", "col2"])
>>> df2 = spark.createDataFrame([[4, 5, 6]], ["col1", "col2", "col0"])
>>> df1.unionByName(df2).show()
+----+----+----+
|col0|col1|col2|
+----+----+----+
| 1| 2| 3|
| 6| 4| 5|
+----+----+----+
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/dataframe.py#L1466-L1485
|
train
|
Returns a new DataFrame containing union of rows in this and another DataFrame.
|
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apache/spark
|
python/pyspark/mllib/stat/_statistics.py
|
Statistics.corr
|
def corr(x, y=None, method=None):
"""
Compute the correlation (matrix) for the input RDD(s) using the
specified method.
Methods currently supported: I{pearson (default), spearman}.
If a single RDD of Vectors is passed in, a correlation matrix
comparing the columns in the input RDD is returned. Use C{method=}
to specify the method to be used for single RDD inout.
If two RDDs of floats are passed in, a single float is returned.
:param x: an RDD of vector for which the correlation matrix is to be computed,
or an RDD of float of the same cardinality as y when y is specified.
:param y: an RDD of float of the same cardinality as x.
:param method: String specifying the method to use for computing correlation.
Supported: `pearson` (default), `spearman`
:return: Correlation matrix comparing columns in x.
>>> x = sc.parallelize([1.0, 0.0, -2.0], 2)
>>> y = sc.parallelize([4.0, 5.0, 3.0], 2)
>>> zeros = sc.parallelize([0.0, 0.0, 0.0], 2)
>>> abs(Statistics.corr(x, y) - 0.6546537) < 1e-7
True
>>> Statistics.corr(x, y) == Statistics.corr(x, y, "pearson")
True
>>> Statistics.corr(x, y, "spearman")
0.5
>>> from math import isnan
>>> isnan(Statistics.corr(x, zeros))
True
>>> from pyspark.mllib.linalg import Vectors
>>> rdd = sc.parallelize([Vectors.dense([1, 0, 0, -2]), Vectors.dense([4, 5, 0, 3]),
... Vectors.dense([6, 7, 0, 8]), Vectors.dense([9, 0, 0, 1])])
>>> pearsonCorr = Statistics.corr(rdd)
>>> print(str(pearsonCorr).replace('nan', 'NaN'))
[[ 1. 0.05564149 NaN 0.40047142]
[ 0.05564149 1. NaN 0.91359586]
[ NaN NaN 1. NaN]
[ 0.40047142 0.91359586 NaN 1. ]]
>>> spearmanCorr = Statistics.corr(rdd, method="spearman")
>>> print(str(spearmanCorr).replace('nan', 'NaN'))
[[ 1. 0.10540926 NaN 0.4 ]
[ 0.10540926 1. NaN 0.9486833 ]
[ NaN NaN 1. NaN]
[ 0.4 0.9486833 NaN 1. ]]
>>> try:
... Statistics.corr(rdd, "spearman")
... print("Method name as second argument without 'method=' shouldn't be allowed.")
... except TypeError:
... pass
"""
# Check inputs to determine whether a single value or a matrix is needed for output.
# Since it's legal for users to use the method name as the second argument, we need to
# check if y is used to specify the method name instead.
if type(y) == str:
raise TypeError("Use 'method=' to specify method name.")
if not y:
return callMLlibFunc("corr", x.map(_convert_to_vector), method).toArray()
else:
return callMLlibFunc("corr", x.map(float), y.map(float), method)
|
python
|
def corr(x, y=None, method=None):
"""
Compute the correlation (matrix) for the input RDD(s) using the
specified method.
Methods currently supported: I{pearson (default), spearman}.
If a single RDD of Vectors is passed in, a correlation matrix
comparing the columns in the input RDD is returned. Use C{method=}
to specify the method to be used for single RDD inout.
If two RDDs of floats are passed in, a single float is returned.
:param x: an RDD of vector for which the correlation matrix is to be computed,
or an RDD of float of the same cardinality as y when y is specified.
:param y: an RDD of float of the same cardinality as x.
:param method: String specifying the method to use for computing correlation.
Supported: `pearson` (default), `spearman`
:return: Correlation matrix comparing columns in x.
>>> x = sc.parallelize([1.0, 0.0, -2.0], 2)
>>> y = sc.parallelize([4.0, 5.0, 3.0], 2)
>>> zeros = sc.parallelize([0.0, 0.0, 0.0], 2)
>>> abs(Statistics.corr(x, y) - 0.6546537) < 1e-7
True
>>> Statistics.corr(x, y) == Statistics.corr(x, y, "pearson")
True
>>> Statistics.corr(x, y, "spearman")
0.5
>>> from math import isnan
>>> isnan(Statistics.corr(x, zeros))
True
>>> from pyspark.mllib.linalg import Vectors
>>> rdd = sc.parallelize([Vectors.dense([1, 0, 0, -2]), Vectors.dense([4, 5, 0, 3]),
... Vectors.dense([6, 7, 0, 8]), Vectors.dense([9, 0, 0, 1])])
>>> pearsonCorr = Statistics.corr(rdd)
>>> print(str(pearsonCorr).replace('nan', 'NaN'))
[[ 1. 0.05564149 NaN 0.40047142]
[ 0.05564149 1. NaN 0.91359586]
[ NaN NaN 1. NaN]
[ 0.40047142 0.91359586 NaN 1. ]]
>>> spearmanCorr = Statistics.corr(rdd, method="spearman")
>>> print(str(spearmanCorr).replace('nan', 'NaN'))
[[ 1. 0.10540926 NaN 0.4 ]
[ 0.10540926 1. NaN 0.9486833 ]
[ NaN NaN 1. NaN]
[ 0.4 0.9486833 NaN 1. ]]
>>> try:
... Statistics.corr(rdd, "spearman")
... print("Method name as second argument without 'method=' shouldn't be allowed.")
... except TypeError:
... pass
"""
# Check inputs to determine whether a single value or a matrix is needed for output.
# Since it's legal for users to use the method name as the second argument, we need to
# check if y is used to specify the method name instead.
if type(y) == str:
raise TypeError("Use 'method=' to specify method name.")
if not y:
return callMLlibFunc("corr", x.map(_convert_to_vector), method).toArray()
else:
return callMLlibFunc("corr", x.map(float), y.map(float), method)
|
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Compute the correlation (matrix) for the input RDD(s) using the
specified method.
Methods currently supported: I{pearson (default), spearman}.
If a single RDD of Vectors is passed in, a correlation matrix
comparing the columns in the input RDD is returned. Use C{method=}
to specify the method to be used for single RDD inout.
If two RDDs of floats are passed in, a single float is returned.
:param x: an RDD of vector for which the correlation matrix is to be computed,
or an RDD of float of the same cardinality as y when y is specified.
:param y: an RDD of float of the same cardinality as x.
:param method: String specifying the method to use for computing correlation.
Supported: `pearson` (default), `spearman`
:return: Correlation matrix comparing columns in x.
>>> x = sc.parallelize([1.0, 0.0, -2.0], 2)
>>> y = sc.parallelize([4.0, 5.0, 3.0], 2)
>>> zeros = sc.parallelize([0.0, 0.0, 0.0], 2)
>>> abs(Statistics.corr(x, y) - 0.6546537) < 1e-7
True
>>> Statistics.corr(x, y) == Statistics.corr(x, y, "pearson")
True
>>> Statistics.corr(x, y, "spearman")
0.5
>>> from math import isnan
>>> isnan(Statistics.corr(x, zeros))
True
>>> from pyspark.mllib.linalg import Vectors
>>> rdd = sc.parallelize([Vectors.dense([1, 0, 0, -2]), Vectors.dense([4, 5, 0, 3]),
... Vectors.dense([6, 7, 0, 8]), Vectors.dense([9, 0, 0, 1])])
>>> pearsonCorr = Statistics.corr(rdd)
>>> print(str(pearsonCorr).replace('nan', 'NaN'))
[[ 1. 0.05564149 NaN 0.40047142]
[ 0.05564149 1. NaN 0.91359586]
[ NaN NaN 1. NaN]
[ 0.40047142 0.91359586 NaN 1. ]]
>>> spearmanCorr = Statistics.corr(rdd, method="spearman")
>>> print(str(spearmanCorr).replace('nan', 'NaN'))
[[ 1. 0.10540926 NaN 0.4 ]
[ 0.10540926 1. NaN 0.9486833 ]
[ NaN NaN 1. NaN]
[ 0.4 0.9486833 NaN 1. ]]
>>> try:
... Statistics.corr(rdd, "spearman")
... print("Method name as second argument without 'method=' shouldn't be allowed.")
... except TypeError:
... pass
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/mllib/stat/_statistics.py#L97-L157
|
train
|
Compute the correlation matrix for the input RDDs x and y.
|
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|
python/pyspark/heapq3.py
|
_siftdown_max
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def _siftdown_max(heap, startpos, pos):
'Maxheap variant of _siftdown'
newitem = heap[pos]
# Follow the path to the root, moving parents down until finding a place
# newitem fits.
while pos > startpos:
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pos = parentpos
continue
break
heap[pos] = newitem
|
python
|
def _siftdown_max(heap, startpos, pos):
'Maxheap variant of _siftdown'
newitem = heap[pos]
# Follow the path to the root, moving parents down until finding a place
# newitem fits.
while pos > startpos:
parentpos = (pos - 1) >> 1
parent = heap[parentpos]
if parent < newitem:
heap[pos] = parent
pos = parentpos
continue
break
heap[pos] = newitem
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/heapq3.py#L559-L572
|
train
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python/pyspark/sql/column.py
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_bin_op
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def _bin_op(name, doc="binary operator"):
""" Create a method for given binary operator
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def _(self, other):
jc = other._jc if isinstance(other, Column) else other
njc = getattr(self._jc, name)(jc)
return Column(njc)
_.__doc__ = doc
return _
|
python
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def _bin_op(name, doc="binary operator"):
""" Create a method for given binary operator
"""
def _(self, other):
jc = other._jc if isinstance(other, Column) else other
njc = getattr(self._jc, name)(jc)
return Column(njc)
_.__doc__ = doc
return _
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/column.py#L110-L118
|
train
|
Create a method that returns a new object for the given binary operator.
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pandas-dev/pandas
|
pandas/core/sorting.py
|
get_group_index_sorter
|
def get_group_index_sorter(group_index, ngroups):
"""
algos.groupsort_indexer implements `counting sort` and it is at least
O(ngroups), where
ngroups = prod(shape)
shape = map(len, keys)
that is, linear in the number of combinations (cartesian product) of unique
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np.argsort(kind='mergesort') is O(count x log(count)) where count is the
length of the data-frame;
Both algorithms are `stable` sort and that is necessary for correctness of
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df.groupby(key)[col].transform('first')
"""
count = len(group_index)
alpha = 0.0 # taking complexities literally; there may be
beta = 1.0 # some room for fine-tuning these parameters
do_groupsort = (count > 0 and ((alpha + beta * ngroups) <
(count * np.log(count))))
if do_groupsort:
sorter, _ = algos.groupsort_indexer(ensure_int64(group_index),
ngroups)
return ensure_platform_int(sorter)
else:
return group_index.argsort(kind='mergesort')
|
python
|
def get_group_index_sorter(group_index, ngroups):
"""
algos.groupsort_indexer implements `counting sort` and it is at least
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ngroups = prod(shape)
shape = map(len, keys)
that is, linear in the number of combinations (cartesian product) of unique
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np.argsort(kind='mergesort') is O(count x log(count)) where count is the
length of the data-frame;
Both algorithms are `stable` sort and that is necessary for correctness of
groupby operations. e.g. consider:
df.groupby(key)[col].transform('first')
"""
count = len(group_index)
alpha = 0.0 # taking complexities literally; there may be
beta = 1.0 # some room for fine-tuning these parameters
do_groupsort = (count > 0 and ((alpha + beta * ngroups) <
(count * np.log(count))))
if do_groupsort:
sorter, _ = algos.groupsort_indexer(ensure_int64(group_index),
ngroups)
return ensure_platform_int(sorter)
else:
return group_index.argsort(kind='mergesort')
|
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df.groupby(key)[col].transform('first')
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/sorting.py#L338-L362
|
train
|
This function returns the index of the unique items in the group_index.
|
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python/pyspark/mllib/feature.py
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HashingTF.transform
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def transform(self, document):
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freq[i] = 1.0 if self.binary else freq.get(i, 0) + 1.0
return Vectors.sparse(self.numFeatures, freq.items())
|
python
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def transform(self, document):
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for term in document:
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freq[i] = 1.0 if self.binary else freq.get(i, 0) + 1.0
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python/pyspark/mllib/util.py
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LinearDataGenerator.generateLinearRDD
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def generateLinearRDD(sc, nexamples, nfeatures, eps,
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"""
Generate an RDD of LabeledPoints.
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return callMLlibFunc(
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|
python
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def generateLinearRDD(sc, nexamples, nfeatures, eps,
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"""
Generate an RDD of LabeledPoints.
"""
return callMLlibFunc(
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618d6bff71073c8c93501ab7392c3cc579730f0b
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apache/spark
|
python/pyspark/shuffle.py
|
ExternalMerger._spill
|
def _spill(self):
"""
dump already partitioned data into disks.
It will dump the data in batch for better performance.
"""
global MemoryBytesSpilled, DiskBytesSpilled
path = self._get_spill_dir(self.spills)
if not os.path.exists(path):
os.makedirs(path)
used_memory = get_used_memory()
if not self.pdata:
# The data has not been partitioned, it will iterator the
# dataset once, write them into different files, has no
# additional memory. It only called when the memory goes
# above limit at the first time.
# open all the files for writing
streams = [open(os.path.join(path, str(i)), 'wb')
for i in range(self.partitions)]
for k, v in self.data.items():
h = self._partition(k)
# put one item in batch, make it compatible with load_stream
# it will increase the memory if dump them in batch
self.serializer.dump_stream([(k, v)], streams[h])
for s in streams:
DiskBytesSpilled += s.tell()
s.close()
self.data.clear()
self.pdata.extend([{} for i in range(self.partitions)])
else:
for i in range(self.partitions):
p = os.path.join(path, str(i))
with open(p, "wb") as f:
# dump items in batch
self.serializer.dump_stream(iter(self.pdata[i].items()), f)
self.pdata[i].clear()
DiskBytesSpilled += os.path.getsize(p)
self.spills += 1
gc.collect() # release the memory as much as possible
MemoryBytesSpilled += max(used_memory - get_used_memory(), 0) << 20
|
python
|
def _spill(self):
"""
dump already partitioned data into disks.
It will dump the data in batch for better performance.
"""
global MemoryBytesSpilled, DiskBytesSpilled
path = self._get_spill_dir(self.spills)
if not os.path.exists(path):
os.makedirs(path)
used_memory = get_used_memory()
if not self.pdata:
# The data has not been partitioned, it will iterator the
# dataset once, write them into different files, has no
# additional memory. It only called when the memory goes
# above limit at the first time.
# open all the files for writing
streams = [open(os.path.join(path, str(i)), 'wb')
for i in range(self.partitions)]
for k, v in self.data.items():
h = self._partition(k)
# put one item in batch, make it compatible with load_stream
# it will increase the memory if dump them in batch
self.serializer.dump_stream([(k, v)], streams[h])
for s in streams:
DiskBytesSpilled += s.tell()
s.close()
self.data.clear()
self.pdata.extend([{} for i in range(self.partitions)])
else:
for i in range(self.partitions):
p = os.path.join(path, str(i))
with open(p, "wb") as f:
# dump items in batch
self.serializer.dump_stream(iter(self.pdata[i].items()), f)
self.pdata[i].clear()
DiskBytesSpilled += os.path.getsize(p)
self.spills += 1
gc.collect() # release the memory as much as possible
MemoryBytesSpilled += max(used_memory - get_used_memory(), 0) << 20
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/shuffle.py#L291-L337
|
train
|
This function will dump already partitioned data into disks. It will dump the data into the disks and the memory used by the memory.
|
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huggingface/pytorch-pretrained-BERT
|
pytorch_pretrained_bert/modeling_openai.py
|
load_tf_weights_in_openai_gpt
|
def load_tf_weights_in_openai_gpt(model, openai_checkpoint_folder_path):
""" Load tf pre-trained weights in a pytorch model (from NumPy arrays here)
"""
import re
import numpy as np
print("Loading weights...")
names = json.load(open(openai_checkpoint_folder_path + '/parameters_names.json', "r", encoding='utf-8'))
shapes = json.load(open(openai_checkpoint_folder_path + '/params_shapes.json', "r", encoding='utf-8'))
offsets = np.cumsum([np.prod(shape) for shape in shapes])
init_params = [np.load(openai_checkpoint_folder_path + '/params_{}.npy'.format(n)) for n in range(10)]
init_params = np.split(np.concatenate(init_params, 0), offsets)[:-1]
init_params = [param.reshape(shape) for param, shape in zip(init_params, shapes)]
# This was used when we had a single embedding matrix for positions and tokens
# init_params[0] = np.concatenate([init_params[1], init_params[0]], 0)
# del init_params[1]
init_params = [arr.squeeze() for arr in init_params]
try:
assert model.tokens_embed.weight.shape == init_params[1].shape
assert model.positions_embed.weight.shape == init_params[0].shape
except AssertionError as e:
e.args += (model.tokens_embed.weight.shape, init_params[1].shape)
e.args += (model.positions_embed.weight.shape, init_params[0].shape)
raise
model.tokens_embed.weight.data = torch.from_numpy(init_params[1])
model.positions_embed.weight.data = torch.from_numpy(init_params[0])
names.pop(0)
# Pop position and token embedding arrays
init_params.pop(0)
init_params.pop(0)
for name, array in zip(names, init_params): # names[1:n_transfer], init_params[1:n_transfer]):
name = name[6:] # skip "model/"
assert name[-2:] == ":0"
name = name[:-2]
name = name.split('/')
pointer = model
for m_name in name:
if re.fullmatch(r'[A-Za-z]+\d+', m_name):
l = re.split(r'(\d+)', m_name)
else:
l = [m_name]
if l[0] == 'g':
pointer = getattr(pointer, 'weight')
elif l[0] == 'b':
pointer = getattr(pointer, 'bias')
elif l[0] == 'w':
pointer = getattr(pointer, 'weight')
else:
pointer = getattr(pointer, l[0])
if len(l) >= 2:
num = int(l[1])
pointer = pointer[num]
try:
assert pointer.shape == array.shape
except AssertionError as e:
e.args += (pointer.shape, array.shape)
raise
try:
assert pointer.shape == array.shape
except AssertionError as e:
e.args += (pointer.shape, array.shape)
raise
print("Initialize PyTorch weight {}".format(name))
pointer.data = torch.from_numpy(array)
return model
|
python
|
def load_tf_weights_in_openai_gpt(model, openai_checkpoint_folder_path):
""" Load tf pre-trained weights in a pytorch model (from NumPy arrays here)
"""
import re
import numpy as np
print("Loading weights...")
names = json.load(open(openai_checkpoint_folder_path + '/parameters_names.json', "r", encoding='utf-8'))
shapes = json.load(open(openai_checkpoint_folder_path + '/params_shapes.json', "r", encoding='utf-8'))
offsets = np.cumsum([np.prod(shape) for shape in shapes])
init_params = [np.load(openai_checkpoint_folder_path + '/params_{}.npy'.format(n)) for n in range(10)]
init_params = np.split(np.concatenate(init_params, 0), offsets)[:-1]
init_params = [param.reshape(shape) for param, shape in zip(init_params, shapes)]
# This was used when we had a single embedding matrix for positions and tokens
# init_params[0] = np.concatenate([init_params[1], init_params[0]], 0)
# del init_params[1]
init_params = [arr.squeeze() for arr in init_params]
try:
assert model.tokens_embed.weight.shape == init_params[1].shape
assert model.positions_embed.weight.shape == init_params[0].shape
except AssertionError as e:
e.args += (model.tokens_embed.weight.shape, init_params[1].shape)
e.args += (model.positions_embed.weight.shape, init_params[0].shape)
raise
model.tokens_embed.weight.data = torch.from_numpy(init_params[1])
model.positions_embed.weight.data = torch.from_numpy(init_params[0])
names.pop(0)
# Pop position and token embedding arrays
init_params.pop(0)
init_params.pop(0)
for name, array in zip(names, init_params): # names[1:n_transfer], init_params[1:n_transfer]):
name = name[6:] # skip "model/"
assert name[-2:] == ":0"
name = name[:-2]
name = name.split('/')
pointer = model
for m_name in name:
if re.fullmatch(r'[A-Za-z]+\d+', m_name):
l = re.split(r'(\d+)', m_name)
else:
l = [m_name]
if l[0] == 'g':
pointer = getattr(pointer, 'weight')
elif l[0] == 'b':
pointer = getattr(pointer, 'bias')
elif l[0] == 'w':
pointer = getattr(pointer, 'weight')
else:
pointer = getattr(pointer, l[0])
if len(l) >= 2:
num = int(l[1])
pointer = pointer[num]
try:
assert pointer.shape == array.shape
except AssertionError as e:
e.args += (pointer.shape, array.shape)
raise
try:
assert pointer.shape == array.shape
except AssertionError as e:
e.args += (pointer.shape, array.shape)
raise
print("Initialize PyTorch weight {}".format(name))
pointer.data = torch.from_numpy(array)
return model
|
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Load tf pre-trained weights in a pytorch model (from NumPy arrays here)
|
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b832d5bb8a6dfc5965015b828e577677eace601e
|
https://github.com/huggingface/pytorch-pretrained-BERT/blob/b832d5bb8a6dfc5965015b828e577677eace601e/pytorch_pretrained_bert/modeling_openai.py#L46-L113
|
train
|
Load tf pre - trained weights in a pytorch model.
|
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apache/spark
|
python/pyspark/sql/dataframe.py
|
DataFrame.alias
|
def alias(self, alias):
"""Returns a new :class:`DataFrame` with an alias set.
:param alias: string, an alias name to be set for the DataFrame.
>>> from pyspark.sql.functions import *
>>> df_as1 = df.alias("df_as1")
>>> df_as2 = df.alias("df_as2")
>>> joined_df = df_as1.join(df_as2, col("df_as1.name") == col("df_as2.name"), 'inner')
>>> joined_df.select("df_as1.name", "df_as2.name", "df_as2.age").collect()
[Row(name=u'Bob', name=u'Bob', age=5), Row(name=u'Alice', name=u'Alice', age=2)]
"""
assert isinstance(alias, basestring), "alias should be a string"
return DataFrame(getattr(self._jdf, "as")(alias), self.sql_ctx)
|
python
|
def alias(self, alias):
"""Returns a new :class:`DataFrame` with an alias set.
:param alias: string, an alias name to be set for the DataFrame.
>>> from pyspark.sql.functions import *
>>> df_as1 = df.alias("df_as1")
>>> df_as2 = df.alias("df_as2")
>>> joined_df = df_as1.join(df_as2, col("df_as1.name") == col("df_as2.name"), 'inner')
>>> joined_df.select("df_as1.name", "df_as2.name", "df_as2.age").collect()
[Row(name=u'Bob', name=u'Bob', age=5), Row(name=u'Alice', name=u'Alice', age=2)]
"""
assert isinstance(alias, basestring), "alias should be a string"
return DataFrame(getattr(self._jdf, "as")(alias), self.sql_ctx)
|
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Returns a new :class:`DataFrame` with an alias set.
:param alias: string, an alias name to be set for the DataFrame.
>>> from pyspark.sql.functions import *
>>> df_as1 = df.alias("df_as1")
>>> df_as2 = df.alias("df_as2")
>>> joined_df = df_as1.join(df_as2, col("df_as1.name") == col("df_as2.name"), 'inner')
>>> joined_df.select("df_as1.name", "df_as2.name", "df_as2.age").collect()
[Row(name=u'Bob', name=u'Bob', age=5), Row(name=u'Alice', name=u'Alice', age=2)]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/dataframe.py#L958-L971
|
train
|
Returns a new DataFrame with an alias set.
|
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pandas-dev/pandas
|
pandas/io/parquet.py
|
to_parquet
|
def to_parquet(df, path, engine='auto', compression='snappy', index=None,
partition_cols=None, **kwargs):
"""
Write a DataFrame to the parquet format.
Parameters
----------
path : str
File path or Root Directory path. Will be used as Root Directory path
while writing a partitioned dataset.
.. versionchanged:: 0.24.0
engine : {'auto', 'pyarrow', 'fastparquet'}, default 'auto'
Parquet library to use. If 'auto', then the option
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behavior is to try 'pyarrow', falling back to 'fastparquet' if
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compression : {'snappy', 'gzip', 'brotli', None}, default 'snappy'
Name of the compression to use. Use ``None`` for no compression.
index : bool, default None
If ``True``, include the dataframe's index(es) in the file output. If
``False``, they will not be written to the file. If ``None``, the
engine's default behavior will be used.
.. versionadded 0.24.0
partition_cols : list, optional, default None
Column names by which to partition the dataset
Columns are partitioned in the order they are given
.. versionadded:: 0.24.0
kwargs
Additional keyword arguments passed to the engine
"""
impl = get_engine(engine)
return impl.write(df, path, compression=compression, index=index,
partition_cols=partition_cols, **kwargs)
|
python
|
def to_parquet(df, path, engine='auto', compression='snappy', index=None,
partition_cols=None, **kwargs):
"""
Write a DataFrame to the parquet format.
Parameters
----------
path : str
File path or Root Directory path. Will be used as Root Directory path
while writing a partitioned dataset.
.. versionchanged:: 0.24.0
engine : {'auto', 'pyarrow', 'fastparquet'}, default 'auto'
Parquet library to use. If 'auto', then the option
``io.parquet.engine`` is used. The default ``io.parquet.engine``
behavior is to try 'pyarrow', falling back to 'fastparquet' if
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compression : {'snappy', 'gzip', 'brotli', None}, default 'snappy'
Name of the compression to use. Use ``None`` for no compression.
index : bool, default None
If ``True``, include the dataframe's index(es) in the file output. If
``False``, they will not be written to the file. If ``None``, the
engine's default behavior will be used.
.. versionadded 0.24.0
partition_cols : list, optional, default None
Column names by which to partition the dataset
Columns are partitioned in the order they are given
.. versionadded:: 0.24.0
kwargs
Additional keyword arguments passed to the engine
"""
impl = get_engine(engine)
return impl.write(df, path, compression=compression, index=index,
partition_cols=partition_cols, **kwargs)
|
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Column names by which to partition the dataset
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Additional keyword arguments passed to the engine
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[
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/io/parquet.py#L213-L251
|
train
|
Write a DataFrame to the Parquet format.
|
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pandas-dev/pandas
|
pandas/core/internals/blocks.py
|
Block.is_categorical_astype
|
def is_categorical_astype(self, dtype):
"""
validate that we have a astypeable to categorical,
returns a boolean if we are a categorical
"""
if dtype is Categorical or dtype is CategoricalDtype:
# this is a pd.Categorical, but is not
# a valid type for astypeing
raise TypeError("invalid type {0} for astype".format(dtype))
elif is_categorical_dtype(dtype):
return True
return False
|
python
|
def is_categorical_astype(self, dtype):
"""
validate that we have a astypeable to categorical,
returns a boolean if we are a categorical
"""
if dtype is Categorical or dtype is CategoricalDtype:
# this is a pd.Categorical, but is not
# a valid type for astypeing
raise TypeError("invalid type {0} for astype".format(dtype))
elif is_categorical_dtype(dtype):
return True
return False
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/internals/blocks.py#L145-L158
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train
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validate that we have a astypeable to categorical return a boolean if we are a categorical
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pandas-dev/pandas
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pandas/core/indexes/base.py
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Index._maybe_cast_indexer
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def _maybe_cast_indexer(self, key):
"""
If we have a float key and are not a floating index, then try to cast
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if is_float(key) and not self.is_floating():
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return key
|
python
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def _maybe_cast_indexer(self, key):
"""
If we have a float key and are not a floating index, then try to cast
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"""
if is_float(key) and not self.is_floating():
try:
ckey = int(key)
if ckey == key:
key = ckey
except (OverflowError, ValueError, TypeError):
pass
return key
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apache/spark
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python/pyspark/sql/dataframe.py
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DataFrame.localCheckpoint
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def localCheckpoint(self, eager=True):
"""Returns a locally checkpointed version of this Dataset. Checkpointing can be used to
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algorithms where the plan may grow exponentially. Local checkpoints are stored in the
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:param eager: Whether to checkpoint this DataFrame immediately
.. note:: Experimental
"""
jdf = self._jdf.localCheckpoint(eager)
return DataFrame(jdf, self.sql_ctx)
|
python
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def localCheckpoint(self, eager=True):
"""Returns a locally checkpointed version of this Dataset. Checkpointing can be used to
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algorithms where the plan may grow exponentially. Local checkpoints are stored in the
executors using the caching subsystem and therefore they are not reliable.
:param eager: Whether to checkpoint this DataFrame immediately
.. note:: Experimental
"""
jdf = self._jdf.localCheckpoint(eager)
return DataFrame(jdf, self.sql_ctx)
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618d6bff71073c8c93501ab7392c3cc579730f0b
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train
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pandas-dev/pandas
|
pandas/core/internals/blocks.py
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Block._check_ndim
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def _check_ndim(self, values, ndim):
"""
ndim inference and validation.
Infers ndim from 'values' if not provided to __init__.
Validates that values.ndim and ndim are consistent if and only if
the class variable '_validate_ndim' is True.
Parameters
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values : array-like
ndim : int or None
Returns
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Raises
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ndim = values.ndim
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msg = ("Wrong number of dimensions. values.ndim != ndim "
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raise ValueError(msg.format(values.ndim, ndim))
return ndim
|
python
|
def _check_ndim(self, values, ndim):
"""
ndim inference and validation.
Infers ndim from 'values' if not provided to __init__.
Validates that values.ndim and ndim are consistent if and only if
the class variable '_validate_ndim' is True.
Parameters
----------
values : array-like
ndim : int or None
Returns
-------
ndim : int
Raises
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ValueError : the number of dimensions do not match
"""
if ndim is None:
ndim = values.ndim
if self._validate_ndim and values.ndim != ndim:
msg = ("Wrong number of dimensions. values.ndim != ndim "
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raise ValueError(msg.format(values.ndim, ndim))
return ndim
|
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[
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/internals/blocks.py#L87-L116
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train
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Check that the number of dimensions of the log entry is consistent with the number of entries in the array.
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pandas-dev/pandas
|
pandas/core/indexes/base.py
|
Index._get_unique_index
|
def _get_unique_index(self, dropna=False):
"""
Returns an index containing unique values.
Parameters
----------
dropna : bool
If True, NaN values are dropped.
Returns
-------
uniques : index
"""
if self.is_unique and not dropna:
return self
values = self.values
if not self.is_unique:
values = self.unique()
if dropna:
try:
if self.hasnans:
values = values[~isna(values)]
except NotImplementedError:
pass
return self._shallow_copy(values)
|
python
|
def _get_unique_index(self, dropna=False):
"""
Returns an index containing unique values.
Parameters
----------
dropna : bool
If True, NaN values are dropped.
Returns
-------
uniques : index
"""
if self.is_unique and not dropna:
return self
values = self.values
if not self.is_unique:
values = self.unique()
if dropna:
try:
if self.hasnans:
values = values[~isna(values)]
except NotImplementedError:
pass
return self._shallow_copy(values)
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L2164-L2192
|
train
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apache/spark
|
python/pyspark/sql/types.py
|
_create_converter
|
def _create_converter(dataType):
"""Create a converter to drop the names of fields in obj """
if not _need_converter(dataType):
return lambda x: x
if isinstance(dataType, ArrayType):
conv = _create_converter(dataType.elementType)
return lambda row: [conv(v) for v in row]
elif isinstance(dataType, MapType):
kconv = _create_converter(dataType.keyType)
vconv = _create_converter(dataType.valueType)
return lambda row: dict((kconv(k), vconv(v)) for k, v in row.items())
elif isinstance(dataType, NullType):
return lambda x: None
elif not isinstance(dataType, StructType):
return lambda x: x
# dataType must be StructType
names = [f.name for f in dataType.fields]
converters = [_create_converter(f.dataType) for f in dataType.fields]
convert_fields = any(_need_converter(f.dataType) for f in dataType.fields)
def convert_struct(obj):
if obj is None:
return
if isinstance(obj, (tuple, list)):
if convert_fields:
return tuple(conv(v) for v, conv in zip(obj, converters))
else:
return tuple(obj)
if isinstance(obj, dict):
d = obj
elif hasattr(obj, "__dict__"): # object
d = obj.__dict__
else:
raise TypeError("Unexpected obj type: %s" % type(obj))
if convert_fields:
return tuple([conv(d.get(name)) for name, conv in zip(names, converters)])
else:
return tuple([d.get(name) for name in names])
return convert_struct
|
python
|
def _create_converter(dataType):
"""Create a converter to drop the names of fields in obj """
if not _need_converter(dataType):
return lambda x: x
if isinstance(dataType, ArrayType):
conv = _create_converter(dataType.elementType)
return lambda row: [conv(v) for v in row]
elif isinstance(dataType, MapType):
kconv = _create_converter(dataType.keyType)
vconv = _create_converter(dataType.valueType)
return lambda row: dict((kconv(k), vconv(v)) for k, v in row.items())
elif isinstance(dataType, NullType):
return lambda x: None
elif not isinstance(dataType, StructType):
return lambda x: x
# dataType must be StructType
names = [f.name for f in dataType.fields]
converters = [_create_converter(f.dataType) for f in dataType.fields]
convert_fields = any(_need_converter(f.dataType) for f in dataType.fields)
def convert_struct(obj):
if obj is None:
return
if isinstance(obj, (tuple, list)):
if convert_fields:
return tuple(conv(v) for v, conv in zip(obj, converters))
else:
return tuple(obj)
if isinstance(obj, dict):
d = obj
elif hasattr(obj, "__dict__"): # object
d = obj.__dict__
else:
raise TypeError("Unexpected obj type: %s" % type(obj))
if convert_fields:
return tuple([conv(d.get(name)) for name, conv in zip(names, converters)])
else:
return tuple([d.get(name) for name in names])
return convert_struct
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/types.py#L1133-L1180
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|
Create a converter to drop the names of fields in obj
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pandas-dev/pandas
|
pandas/core/reshape/melt.py
|
wide_to_long
|
def wide_to_long(df, stubnames, i, j, sep="", suffix=r'\d+'):
r"""
Wide panel to long format. Less flexible but more user-friendly than melt.
With stubnames ['A', 'B'], this function expects to find one or more
group of columns with format
A-suffix1, A-suffix2,..., B-suffix1, B-suffix2,...
You specify what you want to call this suffix in the resulting long format
with `j` (for example `j='year'`)
Each row of these wide variables are assumed to be uniquely identified by
`i` (can be a single column name or a list of column names)
All remaining variables in the data frame are left intact.
Parameters
----------
df : DataFrame
The wide-format DataFrame
stubnames : str or list-like
The stub name(s). The wide format variables are assumed to
start with the stub names.
i : str or list-like
Column(s) to use as id variable(s)
j : str
The name of the sub-observation variable. What you wish to name your
suffix in the long format.
sep : str, default ""
A character indicating the separation of the variable names
in the wide format, to be stripped from the names in the long format.
For example, if your column names are A-suffix1, A-suffix2, you
can strip the hyphen by specifying `sep='-'`
.. versionadded:: 0.20.0
suffix : str, default '\\d+'
A regular expression capturing the wanted suffixes. '\\d+' captures
numeric suffixes. Suffixes with no numbers could be specified with the
negated character class '\\D+'. You can also further disambiguate
suffixes, for example, if your wide variables are of the form
A-one, B-two,.., and you have an unrelated column A-rating, you can
ignore the last one by specifying `suffix='(!?one|two)'`
.. versionadded:: 0.20.0
.. versionchanged:: 0.23.0
When all suffixes are numeric, they are cast to int64/float64.
Returns
-------
DataFrame
A DataFrame that contains each stub name as a variable, with new index
(i, j).
Notes
-----
All extra variables are left untouched. This simply uses
`pandas.melt` under the hood, but is hard-coded to "do the right thing"
in a typical case.
Examples
--------
>>> np.random.seed(123)
>>> df = pd.DataFrame({"A1970" : {0 : "a", 1 : "b", 2 : "c"},
... "A1980" : {0 : "d", 1 : "e", 2 : "f"},
... "B1970" : {0 : 2.5, 1 : 1.2, 2 : .7},
... "B1980" : {0 : 3.2, 1 : 1.3, 2 : .1},
... "X" : dict(zip(range(3), np.random.randn(3)))
... })
>>> df["id"] = df.index
>>> df
A1970 A1980 B1970 B1980 X id
0 a d 2.5 3.2 -1.085631 0
1 b e 1.2 1.3 0.997345 1
2 c f 0.7 0.1 0.282978 2
>>> pd.wide_to_long(df, ["A", "B"], i="id", j="year")
... # doctest: +NORMALIZE_WHITESPACE
X A B
id year
0 1970 -1.085631 a 2.5
1 1970 0.997345 b 1.2
2 1970 0.282978 c 0.7
0 1980 -1.085631 d 3.2
1 1980 0.997345 e 1.3
2 1980 0.282978 f 0.1
With multiple id columns
>>> df = pd.DataFrame({
... 'famid': [1, 1, 1, 2, 2, 2, 3, 3, 3],
... 'birth': [1, 2, 3, 1, 2, 3, 1, 2, 3],
... 'ht1': [2.8, 2.9, 2.2, 2, 1.8, 1.9, 2.2, 2.3, 2.1],
... 'ht2': [3.4, 3.8, 2.9, 3.2, 2.8, 2.4, 3.3, 3.4, 2.9]
... })
>>> df
birth famid ht1 ht2
0 1 1 2.8 3.4
1 2 1 2.9 3.8
2 3 1 2.2 2.9
3 1 2 2.0 3.2
4 2 2 1.8 2.8
5 3 2 1.9 2.4
6 1 3 2.2 3.3
7 2 3 2.3 3.4
8 3 3 2.1 2.9
>>> l = pd.wide_to_long(df, stubnames='ht', i=['famid', 'birth'], j='age')
>>> l
... # doctest: +NORMALIZE_WHITESPACE
ht
famid birth age
1 1 1 2.8
2 3.4
2 1 2.9
2 3.8
3 1 2.2
2 2.9
2 1 1 2.0
2 3.2
2 1 1.8
2 2.8
3 1 1.9
2 2.4
3 1 1 2.2
2 3.3
2 1 2.3
2 3.4
3 1 2.1
2 2.9
Going from long back to wide just takes some creative use of `unstack`
>>> w = l.unstack()
>>> w.columns = w.columns.map('{0[0]}{0[1]}'.format)
>>> w.reset_index()
famid birth ht1 ht2
0 1 1 2.8 3.4
1 1 2 2.9 3.8
2 1 3 2.2 2.9
3 2 1 2.0 3.2
4 2 2 1.8 2.8
5 2 3 1.9 2.4
6 3 1 2.2 3.3
7 3 2 2.3 3.4
8 3 3 2.1 2.9
Less wieldy column names are also handled
>>> np.random.seed(0)
>>> df = pd.DataFrame({'A(quarterly)-2010': np.random.rand(3),
... 'A(quarterly)-2011': np.random.rand(3),
... 'B(quarterly)-2010': np.random.rand(3),
... 'B(quarterly)-2011': np.random.rand(3),
... 'X' : np.random.randint(3, size=3)})
>>> df['id'] = df.index
>>> df # doctest: +NORMALIZE_WHITESPACE, +ELLIPSIS
A(quarterly)-2010 A(quarterly)-2011 B(quarterly)-2010 ...
0 0.548814 0.544883 0.437587 ...
1 0.715189 0.423655 0.891773 ...
2 0.602763 0.645894 0.963663 ...
X id
0 0 0
1 1 1
2 1 2
>>> pd.wide_to_long(df, ['A(quarterly)', 'B(quarterly)'], i='id',
... j='year', sep='-')
... # doctest: +NORMALIZE_WHITESPACE
X A(quarterly) B(quarterly)
id year
0 2010 0 0.548814 0.437587
1 2010 1 0.715189 0.891773
2 2010 1 0.602763 0.963663
0 2011 0 0.544883 0.383442
1 2011 1 0.423655 0.791725
2 2011 1 0.645894 0.528895
If we have many columns, we could also use a regex to find our
stubnames and pass that list on to wide_to_long
>>> stubnames = sorted(
... set([match[0] for match in df.columns.str.findall(
... r'[A-B]\(.*\)').values if match != [] ])
... )
>>> list(stubnames)
['A(quarterly)', 'B(quarterly)']
All of the above examples have integers as suffixes. It is possible to
have non-integers as suffixes.
>>> df = pd.DataFrame({
... 'famid': [1, 1, 1, 2, 2, 2, 3, 3, 3],
... 'birth': [1, 2, 3, 1, 2, 3, 1, 2, 3],
... 'ht_one': [2.8, 2.9, 2.2, 2, 1.8, 1.9, 2.2, 2.3, 2.1],
... 'ht_two': [3.4, 3.8, 2.9, 3.2, 2.8, 2.4, 3.3, 3.4, 2.9]
... })
>>> df
birth famid ht_one ht_two
0 1 1 2.8 3.4
1 2 1 2.9 3.8
2 3 1 2.2 2.9
3 1 2 2.0 3.2
4 2 2 1.8 2.8
5 3 2 1.9 2.4
6 1 3 2.2 3.3
7 2 3 2.3 3.4
8 3 3 2.1 2.9
>>> l = pd.wide_to_long(df, stubnames='ht', i=['famid', 'birth'], j='age',
sep='_', suffix='\w')
>>> l
... # doctest: +NORMALIZE_WHITESPACE
ht
famid birth age
1 1 one 2.8
two 3.4
2 one 2.9
two 3.8
3 one 2.2
two 2.9
2 1 one 2.0
two 3.2
2 one 1.8
two 2.8
3 one 1.9
two 2.4
3 1 one 2.2
two 3.3
2 one 2.3
two 3.4
3 one 2.1
two 2.9
"""
def get_var_names(df, stub, sep, suffix):
regex = r'^{stub}{sep}{suffix}$'.format(
stub=re.escape(stub), sep=re.escape(sep), suffix=suffix)
pattern = re.compile(regex)
return [col for col in df.columns if pattern.match(col)]
def melt_stub(df, stub, i, j, value_vars, sep):
newdf = melt(df, id_vars=i, value_vars=value_vars,
value_name=stub.rstrip(sep), var_name=j)
newdf[j] = Categorical(newdf[j])
newdf[j] = newdf[j].str.replace(re.escape(stub + sep), "")
# GH17627 Cast numerics suffixes to int/float
newdf[j] = to_numeric(newdf[j], errors='ignore')
return newdf.set_index(i + [j])
if not is_list_like(stubnames):
stubnames = [stubnames]
else:
stubnames = list(stubnames)
if any(col in stubnames for col in df.columns):
raise ValueError("stubname can't be identical to a column name")
if not is_list_like(i):
i = [i]
else:
i = list(i)
if df[i].duplicated().any():
raise ValueError("the id variables need to uniquely identify each row")
value_vars = [get_var_names(df, stub, sep, suffix) for stub in stubnames]
value_vars_flattened = [e for sublist in value_vars for e in sublist]
id_vars = list(set(df.columns.tolist()).difference(value_vars_flattened))
melted = [melt_stub(df, s, i, j, v, sep)
for s, v in zip(stubnames, value_vars)]
melted = melted[0].join(melted[1:], how='outer')
if len(i) == 1:
new = df[id_vars].set_index(i).join(melted)
return new
new = df[id_vars].merge(melted.reset_index(), on=i).set_index(i + [j])
return new
|
python
|
def wide_to_long(df, stubnames, i, j, sep="", suffix=r'\d+'):
r"""
Wide panel to long format. Less flexible but more user-friendly than melt.
With stubnames ['A', 'B'], this function expects to find one or more
group of columns with format
A-suffix1, A-suffix2,..., B-suffix1, B-suffix2,...
You specify what you want to call this suffix in the resulting long format
with `j` (for example `j='year'`)
Each row of these wide variables are assumed to be uniquely identified by
`i` (can be a single column name or a list of column names)
All remaining variables in the data frame are left intact.
Parameters
----------
df : DataFrame
The wide-format DataFrame
stubnames : str or list-like
The stub name(s). The wide format variables are assumed to
start with the stub names.
i : str or list-like
Column(s) to use as id variable(s)
j : str
The name of the sub-observation variable. What you wish to name your
suffix in the long format.
sep : str, default ""
A character indicating the separation of the variable names
in the wide format, to be stripped from the names in the long format.
For example, if your column names are A-suffix1, A-suffix2, you
can strip the hyphen by specifying `sep='-'`
.. versionadded:: 0.20.0
suffix : str, default '\\d+'
A regular expression capturing the wanted suffixes. '\\d+' captures
numeric suffixes. Suffixes with no numbers could be specified with the
negated character class '\\D+'. You can also further disambiguate
suffixes, for example, if your wide variables are of the form
A-one, B-two,.., and you have an unrelated column A-rating, you can
ignore the last one by specifying `suffix='(!?one|two)'`
.. versionadded:: 0.20.0
.. versionchanged:: 0.23.0
When all suffixes are numeric, they are cast to int64/float64.
Returns
-------
DataFrame
A DataFrame that contains each stub name as a variable, with new index
(i, j).
Notes
-----
All extra variables are left untouched. This simply uses
`pandas.melt` under the hood, but is hard-coded to "do the right thing"
in a typical case.
Examples
--------
>>> np.random.seed(123)
>>> df = pd.DataFrame({"A1970" : {0 : "a", 1 : "b", 2 : "c"},
... "A1980" : {0 : "d", 1 : "e", 2 : "f"},
... "B1970" : {0 : 2.5, 1 : 1.2, 2 : .7},
... "B1980" : {0 : 3.2, 1 : 1.3, 2 : .1},
... "X" : dict(zip(range(3), np.random.randn(3)))
... })
>>> df["id"] = df.index
>>> df
A1970 A1980 B1970 B1980 X id
0 a d 2.5 3.2 -1.085631 0
1 b e 1.2 1.3 0.997345 1
2 c f 0.7 0.1 0.282978 2
>>> pd.wide_to_long(df, ["A", "B"], i="id", j="year")
... # doctest: +NORMALIZE_WHITESPACE
X A B
id year
0 1970 -1.085631 a 2.5
1 1970 0.997345 b 1.2
2 1970 0.282978 c 0.7
0 1980 -1.085631 d 3.2
1 1980 0.997345 e 1.3
2 1980 0.282978 f 0.1
With multiple id columns
>>> df = pd.DataFrame({
... 'famid': [1, 1, 1, 2, 2, 2, 3, 3, 3],
... 'birth': [1, 2, 3, 1, 2, 3, 1, 2, 3],
... 'ht1': [2.8, 2.9, 2.2, 2, 1.8, 1.9, 2.2, 2.3, 2.1],
... 'ht2': [3.4, 3.8, 2.9, 3.2, 2.8, 2.4, 3.3, 3.4, 2.9]
... })
>>> df
birth famid ht1 ht2
0 1 1 2.8 3.4
1 2 1 2.9 3.8
2 3 1 2.2 2.9
3 1 2 2.0 3.2
4 2 2 1.8 2.8
5 3 2 1.9 2.4
6 1 3 2.2 3.3
7 2 3 2.3 3.4
8 3 3 2.1 2.9
>>> l = pd.wide_to_long(df, stubnames='ht', i=['famid', 'birth'], j='age')
>>> l
... # doctest: +NORMALIZE_WHITESPACE
ht
famid birth age
1 1 1 2.8
2 3.4
2 1 2.9
2 3.8
3 1 2.2
2 2.9
2 1 1 2.0
2 3.2
2 1 1.8
2 2.8
3 1 1.9
2 2.4
3 1 1 2.2
2 3.3
2 1 2.3
2 3.4
3 1 2.1
2 2.9
Going from long back to wide just takes some creative use of `unstack`
>>> w = l.unstack()
>>> w.columns = w.columns.map('{0[0]}{0[1]}'.format)
>>> w.reset_index()
famid birth ht1 ht2
0 1 1 2.8 3.4
1 1 2 2.9 3.8
2 1 3 2.2 2.9
3 2 1 2.0 3.2
4 2 2 1.8 2.8
5 2 3 1.9 2.4
6 3 1 2.2 3.3
7 3 2 2.3 3.4
8 3 3 2.1 2.9
Less wieldy column names are also handled
>>> np.random.seed(0)
>>> df = pd.DataFrame({'A(quarterly)-2010': np.random.rand(3),
... 'A(quarterly)-2011': np.random.rand(3),
... 'B(quarterly)-2010': np.random.rand(3),
... 'B(quarterly)-2011': np.random.rand(3),
... 'X' : np.random.randint(3, size=3)})
>>> df['id'] = df.index
>>> df # doctest: +NORMALIZE_WHITESPACE, +ELLIPSIS
A(quarterly)-2010 A(quarterly)-2011 B(quarterly)-2010 ...
0 0.548814 0.544883 0.437587 ...
1 0.715189 0.423655 0.891773 ...
2 0.602763 0.645894 0.963663 ...
X id
0 0 0
1 1 1
2 1 2
>>> pd.wide_to_long(df, ['A(quarterly)', 'B(quarterly)'], i='id',
... j='year', sep='-')
... # doctest: +NORMALIZE_WHITESPACE
X A(quarterly) B(quarterly)
id year
0 2010 0 0.548814 0.437587
1 2010 1 0.715189 0.891773
2 2010 1 0.602763 0.963663
0 2011 0 0.544883 0.383442
1 2011 1 0.423655 0.791725
2 2011 1 0.645894 0.528895
If we have many columns, we could also use a regex to find our
stubnames and pass that list on to wide_to_long
>>> stubnames = sorted(
... set([match[0] for match in df.columns.str.findall(
... r'[A-B]\(.*\)').values if match != [] ])
... )
>>> list(stubnames)
['A(quarterly)', 'B(quarterly)']
All of the above examples have integers as suffixes. It is possible to
have non-integers as suffixes.
>>> df = pd.DataFrame({
... 'famid': [1, 1, 1, 2, 2, 2, 3, 3, 3],
... 'birth': [1, 2, 3, 1, 2, 3, 1, 2, 3],
... 'ht_one': [2.8, 2.9, 2.2, 2, 1.8, 1.9, 2.2, 2.3, 2.1],
... 'ht_two': [3.4, 3.8, 2.9, 3.2, 2.8, 2.4, 3.3, 3.4, 2.9]
... })
>>> df
birth famid ht_one ht_two
0 1 1 2.8 3.4
1 2 1 2.9 3.8
2 3 1 2.2 2.9
3 1 2 2.0 3.2
4 2 2 1.8 2.8
5 3 2 1.9 2.4
6 1 3 2.2 3.3
7 2 3 2.3 3.4
8 3 3 2.1 2.9
>>> l = pd.wide_to_long(df, stubnames='ht', i=['famid', 'birth'], j='age',
sep='_', suffix='\w')
>>> l
... # doctest: +NORMALIZE_WHITESPACE
ht
famid birth age
1 1 one 2.8
two 3.4
2 one 2.9
two 3.8
3 one 2.2
two 2.9
2 1 one 2.0
two 3.2
2 one 1.8
two 2.8
3 one 1.9
two 2.4
3 1 one 2.2
two 3.3
2 one 2.3
two 3.4
3 one 2.1
two 2.9
"""
def get_var_names(df, stub, sep, suffix):
regex = r'^{stub}{sep}{suffix}$'.format(
stub=re.escape(stub), sep=re.escape(sep), suffix=suffix)
pattern = re.compile(regex)
return [col for col in df.columns if pattern.match(col)]
def melt_stub(df, stub, i, j, value_vars, sep):
newdf = melt(df, id_vars=i, value_vars=value_vars,
value_name=stub.rstrip(sep), var_name=j)
newdf[j] = Categorical(newdf[j])
newdf[j] = newdf[j].str.replace(re.escape(stub + sep), "")
# GH17627 Cast numerics suffixes to int/float
newdf[j] = to_numeric(newdf[j], errors='ignore')
return newdf.set_index(i + [j])
if not is_list_like(stubnames):
stubnames = [stubnames]
else:
stubnames = list(stubnames)
if any(col in stubnames for col in df.columns):
raise ValueError("stubname can't be identical to a column name")
if not is_list_like(i):
i = [i]
else:
i = list(i)
if df[i].duplicated().any():
raise ValueError("the id variables need to uniquely identify each row")
value_vars = [get_var_names(df, stub, sep, suffix) for stub in stubnames]
value_vars_flattened = [e for sublist in value_vars for e in sublist]
id_vars = list(set(df.columns.tolist()).difference(value_vars_flattened))
melted = [melt_stub(df, s, i, j, v, sep)
for s, v in zip(stubnames, value_vars)]
melted = melted[0].join(melted[1:], how='outer')
if len(i) == 1:
new = df[id_vars].set_index(i).join(melted)
return new
new = df[id_vars].merge(melted.reset_index(), on=i).set_index(i + [j])
return new
|
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r"""
Wide panel to long format. Less flexible but more user-friendly than melt.
With stubnames ['A', 'B'], this function expects to find one or more
group of columns with format
A-suffix1, A-suffix2,..., B-suffix1, B-suffix2,...
You specify what you want to call this suffix in the resulting long format
with `j` (for example `j='year'`)
Each row of these wide variables are assumed to be uniquely identified by
`i` (can be a single column name or a list of column names)
All remaining variables in the data frame are left intact.
Parameters
----------
df : DataFrame
The wide-format DataFrame
stubnames : str or list-like
The stub name(s). The wide format variables are assumed to
start with the stub names.
i : str or list-like
Column(s) to use as id variable(s)
j : str
The name of the sub-observation variable. What you wish to name your
suffix in the long format.
sep : str, default ""
A character indicating the separation of the variable names
in the wide format, to be stripped from the names in the long format.
For example, if your column names are A-suffix1, A-suffix2, you
can strip the hyphen by specifying `sep='-'`
.. versionadded:: 0.20.0
suffix : str, default '\\d+'
A regular expression capturing the wanted suffixes. '\\d+' captures
numeric suffixes. Suffixes with no numbers could be specified with the
negated character class '\\D+'. You can also further disambiguate
suffixes, for example, if your wide variables are of the form
A-one, B-two,.., and you have an unrelated column A-rating, you can
ignore the last one by specifying `suffix='(!?one|two)'`
.. versionadded:: 0.20.0
.. versionchanged:: 0.23.0
When all suffixes are numeric, they are cast to int64/float64.
Returns
-------
DataFrame
A DataFrame that contains each stub name as a variable, with new index
(i, j).
Notes
-----
All extra variables are left untouched. This simply uses
`pandas.melt` under the hood, but is hard-coded to "do the right thing"
in a typical case.
Examples
--------
>>> np.random.seed(123)
>>> df = pd.DataFrame({"A1970" : {0 : "a", 1 : "b", 2 : "c"},
... "A1980" : {0 : "d", 1 : "e", 2 : "f"},
... "B1970" : {0 : 2.5, 1 : 1.2, 2 : .7},
... "B1980" : {0 : 3.2, 1 : 1.3, 2 : .1},
... "X" : dict(zip(range(3), np.random.randn(3)))
... })
>>> df["id"] = df.index
>>> df
A1970 A1980 B1970 B1980 X id
0 a d 2.5 3.2 -1.085631 0
1 b e 1.2 1.3 0.997345 1
2 c f 0.7 0.1 0.282978 2
>>> pd.wide_to_long(df, ["A", "B"], i="id", j="year")
... # doctest: +NORMALIZE_WHITESPACE
X A B
id year
0 1970 -1.085631 a 2.5
1 1970 0.997345 b 1.2
2 1970 0.282978 c 0.7
0 1980 -1.085631 d 3.2
1 1980 0.997345 e 1.3
2 1980 0.282978 f 0.1
With multiple id columns
>>> df = pd.DataFrame({
... 'famid': [1, 1, 1, 2, 2, 2, 3, 3, 3],
... 'birth': [1, 2, 3, 1, 2, 3, 1, 2, 3],
... 'ht1': [2.8, 2.9, 2.2, 2, 1.8, 1.9, 2.2, 2.3, 2.1],
... 'ht2': [3.4, 3.8, 2.9, 3.2, 2.8, 2.4, 3.3, 3.4, 2.9]
... })
>>> df
birth famid ht1 ht2
0 1 1 2.8 3.4
1 2 1 2.9 3.8
2 3 1 2.2 2.9
3 1 2 2.0 3.2
4 2 2 1.8 2.8
5 3 2 1.9 2.4
6 1 3 2.2 3.3
7 2 3 2.3 3.4
8 3 3 2.1 2.9
>>> l = pd.wide_to_long(df, stubnames='ht', i=['famid', 'birth'], j='age')
>>> l
... # doctest: +NORMALIZE_WHITESPACE
ht
famid birth age
1 1 1 2.8
2 3.4
2 1 2.9
2 3.8
3 1 2.2
2 2.9
2 1 1 2.0
2 3.2
2 1 1.8
2 2.8
3 1 1.9
2 2.4
3 1 1 2.2
2 3.3
2 1 2.3
2 3.4
3 1 2.1
2 2.9
Going from long back to wide just takes some creative use of `unstack`
>>> w = l.unstack()
>>> w.columns = w.columns.map('{0[0]}{0[1]}'.format)
>>> w.reset_index()
famid birth ht1 ht2
0 1 1 2.8 3.4
1 1 2 2.9 3.8
2 1 3 2.2 2.9
3 2 1 2.0 3.2
4 2 2 1.8 2.8
5 2 3 1.9 2.4
6 3 1 2.2 3.3
7 3 2 2.3 3.4
8 3 3 2.1 2.9
Less wieldy column names are also handled
>>> np.random.seed(0)
>>> df = pd.DataFrame({'A(quarterly)-2010': np.random.rand(3),
... 'A(quarterly)-2011': np.random.rand(3),
... 'B(quarterly)-2010': np.random.rand(3),
... 'B(quarterly)-2011': np.random.rand(3),
... 'X' : np.random.randint(3, size=3)})
>>> df['id'] = df.index
>>> df # doctest: +NORMALIZE_WHITESPACE, +ELLIPSIS
A(quarterly)-2010 A(quarterly)-2011 B(quarterly)-2010 ...
0 0.548814 0.544883 0.437587 ...
1 0.715189 0.423655 0.891773 ...
2 0.602763 0.645894 0.963663 ...
X id
0 0 0
1 1 1
2 1 2
>>> pd.wide_to_long(df, ['A(quarterly)', 'B(quarterly)'], i='id',
... j='year', sep='-')
... # doctest: +NORMALIZE_WHITESPACE
X A(quarterly) B(quarterly)
id year
0 2010 0 0.548814 0.437587
1 2010 1 0.715189 0.891773
2 2010 1 0.602763 0.963663
0 2011 0 0.544883 0.383442
1 2011 1 0.423655 0.791725
2 2011 1 0.645894 0.528895
If we have many columns, we could also use a regex to find our
stubnames and pass that list on to wide_to_long
>>> stubnames = sorted(
... set([match[0] for match in df.columns.str.findall(
... r'[A-B]\(.*\)').values if match != [] ])
... )
>>> list(stubnames)
['A(quarterly)', 'B(quarterly)']
All of the above examples have integers as suffixes. It is possible to
have non-integers as suffixes.
>>> df = pd.DataFrame({
... 'famid': [1, 1, 1, 2, 2, 2, 3, 3, 3],
... 'birth': [1, 2, 3, 1, 2, 3, 1, 2, 3],
... 'ht_one': [2.8, 2.9, 2.2, 2, 1.8, 1.9, 2.2, 2.3, 2.1],
... 'ht_two': [3.4, 3.8, 2.9, 3.2, 2.8, 2.4, 3.3, 3.4, 2.9]
... })
>>> df
birth famid ht_one ht_two
0 1 1 2.8 3.4
1 2 1 2.9 3.8
2 3 1 2.2 2.9
3 1 2 2.0 3.2
4 2 2 1.8 2.8
5 3 2 1.9 2.4
6 1 3 2.2 3.3
7 2 3 2.3 3.4
8 3 3 2.1 2.9
>>> l = pd.wide_to_long(df, stubnames='ht', i=['famid', 'birth'], j='age',
sep='_', suffix='\w')
>>> l
... # doctest: +NORMALIZE_WHITESPACE
ht
famid birth age
1 1 one 2.8
two 3.4
2 one 2.9
two 3.8
3 one 2.2
two 2.9
2 1 one 2.0
two 3.2
2 one 1.8
two 2.8
3 one 1.9
two 2.4
3 1 one 2.2
two 3.3
2 one 2.3
two 3.4
3 one 2.1
two 2.9
|
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"more",
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/reshape/melt.py#L178-L458
|
train
|
r Returns a new wide - format tree that is a wide - format tree where the first row is the id variable and the second is the name of the sub - observation variable.
|
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apache/spark
|
python/pyspark/sql/functions.py
|
approx_count_distinct
|
def approx_count_distinct(col, rsd=None):
"""Aggregate function: returns a new :class:`Column` for approximate distinct count of
column `col`.
:param rsd: maximum estimation error allowed (default = 0.05). For rsd < 0.01, it is more
efficient to use :func:`countDistinct`
>>> df.agg(approx_count_distinct(df.age).alias('distinct_ages')).collect()
[Row(distinct_ages=2)]
"""
sc = SparkContext._active_spark_context
if rsd is None:
jc = sc._jvm.functions.approx_count_distinct(_to_java_column(col))
else:
jc = sc._jvm.functions.approx_count_distinct(_to_java_column(col), rsd)
return Column(jc)
|
python
|
def approx_count_distinct(col, rsd=None):
"""Aggregate function: returns a new :class:`Column` for approximate distinct count of
column `col`.
:param rsd: maximum estimation error allowed (default = 0.05). For rsd < 0.01, it is more
efficient to use :func:`countDistinct`
>>> df.agg(approx_count_distinct(df.age).alias('distinct_ages')).collect()
[Row(distinct_ages=2)]
"""
sc = SparkContext._active_spark_context
if rsd is None:
jc = sc._jvm.functions.approx_count_distinct(_to_java_column(col))
else:
jc = sc._jvm.functions.approx_count_distinct(_to_java_column(col), rsd)
return Column(jc)
|
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>>> df.agg(approx_count_distinct(df.age).alias('distinct_ages')).collect()
[Row(distinct_ages=2)]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L314-L329
|
train
|
Aggregate function that returns a new column for approximate distinct count of
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|
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apache/spark
|
python/pyspark/rdd.py
|
RDD.aggregateByKey
|
def aggregateByKey(self, zeroValue, seqFunc, combFunc, numPartitions=None,
partitionFunc=portable_hash):
"""
Aggregate the values of each key, using given combine functions and a neutral
"zero value". This function can return a different result type, U, than the type
of the values in this RDD, V. Thus, we need one operation for merging a V into
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def createZero():
return copy.deepcopy(zeroValue)
return self.combineByKey(
lambda v: seqFunc(createZero(), v), seqFunc, combFunc, numPartitions, partitionFunc)
|
python
|
def aggregateByKey(self, zeroValue, seqFunc, combFunc, numPartitions=None,
partitionFunc=portable_hash):
"""
Aggregate the values of each key, using given combine functions and a neutral
"zero value". This function can return a different result type, U, than the type
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a U and one operation for merging two U's, The former operation is used for merging
values within a partition, and the latter is used for merging values between
partitions. To avoid memory allocation, both of these functions are
allowed to modify and return their first argument instead of creating a new U.
"""
def createZero():
return copy.deepcopy(zeroValue)
return self.combineByKey(
lambda v: seqFunc(createZero(), v), seqFunc, combFunc, numPartitions, partitionFunc)
|
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Aggregate the values of each key, using given combine functions and a neutral
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L1876-L1891
|
train
|
Aggregate the values of each key using given combine functions and a neutral
zero value.
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apache/spark
|
python/pyspark/sql/functions.py
|
_create_binary_mathfunction
|
def _create_binary_mathfunction(name, doc=""):
""" Create a binary mathfunction by name"""
def _(col1, col2):
sc = SparkContext._active_spark_context
# For legacy reasons, the arguments here can be implicitly converted into floats,
# if they are not columns or strings.
if isinstance(col1, Column):
arg1 = col1._jc
elif isinstance(col1, basestring):
arg1 = _create_column_from_name(col1)
else:
arg1 = float(col1)
if isinstance(col2, Column):
arg2 = col2._jc
elif isinstance(col2, basestring):
arg2 = _create_column_from_name(col2)
else:
arg2 = float(col2)
jc = getattr(sc._jvm.functions, name)(arg1, arg2)
return Column(jc)
_.__name__ = name
_.__doc__ = doc
return _
|
python
|
def _create_binary_mathfunction(name, doc=""):
""" Create a binary mathfunction by name"""
def _(col1, col2):
sc = SparkContext._active_spark_context
# For legacy reasons, the arguments here can be implicitly converted into floats,
# if they are not columns or strings.
if isinstance(col1, Column):
arg1 = col1._jc
elif isinstance(col1, basestring):
arg1 = _create_column_from_name(col1)
else:
arg1 = float(col1)
if isinstance(col2, Column):
arg2 = col2._jc
elif isinstance(col2, basestring):
arg2 = _create_column_from_name(col2)
else:
arg2 = float(col2)
jc = getattr(sc._jvm.functions, name)(arg1, arg2)
return Column(jc)
_.__name__ = name
_.__doc__ = doc
return _
|
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Create a binary mathfunction by name
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L80-L104
|
train
|
Create a binary math function by name
|
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python/pyspark/shuffle.py
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ExternalSorter._get_path
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def _get_path(self, n):
""" Choose one directory for spill by number n """
d = self.local_dirs[n % len(self.local_dirs)]
if not os.path.exists(d):
os.makedirs(d)
return os.path.join(d, str(n))
|
python
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def _get_path(self, n):
""" Choose one directory for spill by number n """
d = self.local_dirs[n % len(self.local_dirs)]
if not os.path.exists(d):
os.makedirs(d)
return os.path.join(d, str(n))
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/shuffle.py#L440-L445
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train
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apache/spark
|
python/pyspark/sql/streaming.py
|
StreamingQueryManager.awaitAnyTermination
|
def awaitAnyTermination(self, timeout=None):
"""Wait until any of the queries on the associated SQLContext has terminated since the
creation of the context, or since :func:`resetTerminated()` was called. If any query was
terminated with an exception, then the exception will be thrown.
If `timeout` is set, it returns whether the query has terminated or not within the
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If a query has terminated, then subsequent calls to :func:`awaitAnyTermination()` will
either return immediately (if the query was terminated by :func:`query.stop()`),
or throw the exception immediately (if the query was terminated with exception). Use
:func:`resetTerminated()` to clear past terminations and wait for new terminations.
In the case where multiple queries have terminated since :func:`resetTermination()`
was called, if any query has terminated with exception, then :func:`awaitAnyTermination()`
will throw any of the exception. For correctly documenting exceptions across multiple
queries, users need to stop all of them after any of them terminates with exception, and
then check the `query.exception()` for each query.
throws :class:`StreamingQueryException`, if `this` query has terminated with an exception
"""
if timeout is not None:
if not isinstance(timeout, (int, float)) or timeout < 0:
raise ValueError("timeout must be a positive integer or float. Got %s" % timeout)
return self._jsqm.awaitAnyTermination(int(timeout * 1000))
else:
return self._jsqm.awaitAnyTermination()
|
python
|
def awaitAnyTermination(self, timeout=None):
"""Wait until any of the queries on the associated SQLContext has terminated since the
creation of the context, or since :func:`resetTerminated()` was called. If any query was
terminated with an exception, then the exception will be thrown.
If `timeout` is set, it returns whether the query has terminated or not within the
`timeout` seconds.
If a query has terminated, then subsequent calls to :func:`awaitAnyTermination()` will
either return immediately (if the query was terminated by :func:`query.stop()`),
or throw the exception immediately (if the query was terminated with exception). Use
:func:`resetTerminated()` to clear past terminations and wait for new terminations.
In the case where multiple queries have terminated since :func:`resetTermination()`
was called, if any query has terminated with exception, then :func:`awaitAnyTermination()`
will throw any of the exception. For correctly documenting exceptions across multiple
queries, users need to stop all of them after any of them terminates with exception, and
then check the `query.exception()` for each query.
throws :class:`StreamingQueryException`, if `this` query has terminated with an exception
"""
if timeout is not None:
if not isinstance(timeout, (int, float)) or timeout < 0:
raise ValueError("timeout must be a positive integer or float. Got %s" % timeout)
return self._jsqm.awaitAnyTermination(int(timeout * 1000))
else:
return self._jsqm.awaitAnyTermination()
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/streaming.py#L240-L265
|
train
|
Wait until any of the queries on the associated SQLContext has terminated or until the timeout is reached.
|
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apache/spark
|
python/pyspark/sql/types.py
|
_make_type_verifier
|
def _make_type_verifier(dataType, nullable=True, name=None):
"""
Make a verifier that checks the type of obj against dataType and raises a TypeError if they do
not match.
This verifier also checks the value of obj against datatype and raises a ValueError if it's not
within the allowed range, e.g. using 128 as ByteType will overflow. Note that, Python float is
not checked, so it will become infinity when cast to Java float if it overflows.
>>> _make_type_verifier(StructType([]))(None)
>>> _make_type_verifier(StringType())("")
>>> _make_type_verifier(LongType())(0)
>>> _make_type_verifier(ArrayType(ShortType()))(list(range(3)))
>>> _make_type_verifier(ArrayType(StringType()))(set()) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
TypeError:...
>>> _make_type_verifier(MapType(StringType(), IntegerType()))({})
>>> _make_type_verifier(StructType([]))(())
>>> _make_type_verifier(StructType([]))([])
>>> _make_type_verifier(StructType([]))([1]) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> # Check if numeric values are within the allowed range.
>>> _make_type_verifier(ByteType())(12)
>>> _make_type_verifier(ByteType())(1234) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(ByteType(), False)(None) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(
... ArrayType(ShortType(), False))([1, None]) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(MapType(StringType(), IntegerType()))({None: 1})
Traceback (most recent call last):
...
ValueError:...
>>> schema = StructType().add("a", IntegerType()).add("b", StringType(), False)
>>> _make_type_verifier(schema)((1, None)) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
"""
if name is None:
new_msg = lambda msg: msg
new_name = lambda n: "field %s" % n
else:
new_msg = lambda msg: "%s: %s" % (name, msg)
new_name = lambda n: "field %s in %s" % (n, name)
def verify_nullability(obj):
if obj is None:
if nullable:
return True
else:
raise ValueError(new_msg("This field is not nullable, but got None"))
else:
return False
_type = type(dataType)
def assert_acceptable_types(obj):
assert _type in _acceptable_types, \
new_msg("unknown datatype: %s for object %r" % (dataType, obj))
def verify_acceptable_types(obj):
# subclass of them can not be fromInternal in JVM
if type(obj) not in _acceptable_types[_type]:
raise TypeError(new_msg("%s can not accept object %r in type %s"
% (dataType, obj, type(obj))))
if isinstance(dataType, StringType):
# StringType can work with any types
verify_value = lambda _: _
elif isinstance(dataType, UserDefinedType):
verifier = _make_type_verifier(dataType.sqlType(), name=name)
def verify_udf(obj):
if not (hasattr(obj, '__UDT__') and obj.__UDT__ == dataType):
raise ValueError(new_msg("%r is not an instance of type %r" % (obj, dataType)))
verifier(dataType.toInternal(obj))
verify_value = verify_udf
elif isinstance(dataType, ByteType):
def verify_byte(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
if obj < -128 or obj > 127:
raise ValueError(new_msg("object of ByteType out of range, got: %s" % obj))
verify_value = verify_byte
elif isinstance(dataType, ShortType):
def verify_short(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
if obj < -32768 or obj > 32767:
raise ValueError(new_msg("object of ShortType out of range, got: %s" % obj))
verify_value = verify_short
elif isinstance(dataType, IntegerType):
def verify_integer(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
if obj < -2147483648 or obj > 2147483647:
raise ValueError(
new_msg("object of IntegerType out of range, got: %s" % obj))
verify_value = verify_integer
elif isinstance(dataType, ArrayType):
element_verifier = _make_type_verifier(
dataType.elementType, dataType.containsNull, name="element in array %s" % name)
def verify_array(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
for i in obj:
element_verifier(i)
verify_value = verify_array
elif isinstance(dataType, MapType):
key_verifier = _make_type_verifier(dataType.keyType, False, name="key of map %s" % name)
value_verifier = _make_type_verifier(
dataType.valueType, dataType.valueContainsNull, name="value of map %s" % name)
def verify_map(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
for k, v in obj.items():
key_verifier(k)
value_verifier(v)
verify_value = verify_map
elif isinstance(dataType, StructType):
verifiers = []
for f in dataType.fields:
verifier = _make_type_verifier(f.dataType, f.nullable, name=new_name(f.name))
verifiers.append((f.name, verifier))
def verify_struct(obj):
assert_acceptable_types(obj)
if isinstance(obj, dict):
for f, verifier in verifiers:
verifier(obj.get(f))
elif isinstance(obj, Row) and getattr(obj, "__from_dict__", False):
# the order in obj could be different than dataType.fields
for f, verifier in verifiers:
verifier(obj[f])
elif isinstance(obj, (tuple, list)):
if len(obj) != len(verifiers):
raise ValueError(
new_msg("Length of object (%d) does not match with "
"length of fields (%d)" % (len(obj), len(verifiers))))
for v, (_, verifier) in zip(obj, verifiers):
verifier(v)
elif hasattr(obj, "__dict__"):
d = obj.__dict__
for f, verifier in verifiers:
verifier(d.get(f))
else:
raise TypeError(new_msg("StructType can not accept object %r in type %s"
% (obj, type(obj))))
verify_value = verify_struct
else:
def verify_default(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
verify_value = verify_default
def verify(obj):
if not verify_nullability(obj):
verify_value(obj)
return verify
|
python
|
def _make_type_verifier(dataType, nullable=True, name=None):
"""
Make a verifier that checks the type of obj against dataType and raises a TypeError if they do
not match.
This verifier also checks the value of obj against datatype and raises a ValueError if it's not
within the allowed range, e.g. using 128 as ByteType will overflow. Note that, Python float is
not checked, so it will become infinity when cast to Java float if it overflows.
>>> _make_type_verifier(StructType([]))(None)
>>> _make_type_verifier(StringType())("")
>>> _make_type_verifier(LongType())(0)
>>> _make_type_verifier(ArrayType(ShortType()))(list(range(3)))
>>> _make_type_verifier(ArrayType(StringType()))(set()) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
TypeError:...
>>> _make_type_verifier(MapType(StringType(), IntegerType()))({})
>>> _make_type_verifier(StructType([]))(())
>>> _make_type_verifier(StructType([]))([])
>>> _make_type_verifier(StructType([]))([1]) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> # Check if numeric values are within the allowed range.
>>> _make_type_verifier(ByteType())(12)
>>> _make_type_verifier(ByteType())(1234) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(ByteType(), False)(None) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(
... ArrayType(ShortType(), False))([1, None]) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(MapType(StringType(), IntegerType()))({None: 1})
Traceback (most recent call last):
...
ValueError:...
>>> schema = StructType().add("a", IntegerType()).add("b", StringType(), False)
>>> _make_type_verifier(schema)((1, None)) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
"""
if name is None:
new_msg = lambda msg: msg
new_name = lambda n: "field %s" % n
else:
new_msg = lambda msg: "%s: %s" % (name, msg)
new_name = lambda n: "field %s in %s" % (n, name)
def verify_nullability(obj):
if obj is None:
if nullable:
return True
else:
raise ValueError(new_msg("This field is not nullable, but got None"))
else:
return False
_type = type(dataType)
def assert_acceptable_types(obj):
assert _type in _acceptable_types, \
new_msg("unknown datatype: %s for object %r" % (dataType, obj))
def verify_acceptable_types(obj):
# subclass of them can not be fromInternal in JVM
if type(obj) not in _acceptable_types[_type]:
raise TypeError(new_msg("%s can not accept object %r in type %s"
% (dataType, obj, type(obj))))
if isinstance(dataType, StringType):
# StringType can work with any types
verify_value = lambda _: _
elif isinstance(dataType, UserDefinedType):
verifier = _make_type_verifier(dataType.sqlType(), name=name)
def verify_udf(obj):
if not (hasattr(obj, '__UDT__') and obj.__UDT__ == dataType):
raise ValueError(new_msg("%r is not an instance of type %r" % (obj, dataType)))
verifier(dataType.toInternal(obj))
verify_value = verify_udf
elif isinstance(dataType, ByteType):
def verify_byte(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
if obj < -128 or obj > 127:
raise ValueError(new_msg("object of ByteType out of range, got: %s" % obj))
verify_value = verify_byte
elif isinstance(dataType, ShortType):
def verify_short(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
if obj < -32768 or obj > 32767:
raise ValueError(new_msg("object of ShortType out of range, got: %s" % obj))
verify_value = verify_short
elif isinstance(dataType, IntegerType):
def verify_integer(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
if obj < -2147483648 or obj > 2147483647:
raise ValueError(
new_msg("object of IntegerType out of range, got: %s" % obj))
verify_value = verify_integer
elif isinstance(dataType, ArrayType):
element_verifier = _make_type_verifier(
dataType.elementType, dataType.containsNull, name="element in array %s" % name)
def verify_array(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
for i in obj:
element_verifier(i)
verify_value = verify_array
elif isinstance(dataType, MapType):
key_verifier = _make_type_verifier(dataType.keyType, False, name="key of map %s" % name)
value_verifier = _make_type_verifier(
dataType.valueType, dataType.valueContainsNull, name="value of map %s" % name)
def verify_map(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
for k, v in obj.items():
key_verifier(k)
value_verifier(v)
verify_value = verify_map
elif isinstance(dataType, StructType):
verifiers = []
for f in dataType.fields:
verifier = _make_type_verifier(f.dataType, f.nullable, name=new_name(f.name))
verifiers.append((f.name, verifier))
def verify_struct(obj):
assert_acceptable_types(obj)
if isinstance(obj, dict):
for f, verifier in verifiers:
verifier(obj.get(f))
elif isinstance(obj, Row) and getattr(obj, "__from_dict__", False):
# the order in obj could be different than dataType.fields
for f, verifier in verifiers:
verifier(obj[f])
elif isinstance(obj, (tuple, list)):
if len(obj) != len(verifiers):
raise ValueError(
new_msg("Length of object (%d) does not match with "
"length of fields (%d)" % (len(obj), len(verifiers))))
for v, (_, verifier) in zip(obj, verifiers):
verifier(v)
elif hasattr(obj, "__dict__"):
d = obj.__dict__
for f, verifier in verifiers:
verifier(d.get(f))
else:
raise TypeError(new_msg("StructType can not accept object %r in type %s"
% (obj, type(obj))))
verify_value = verify_struct
else:
def verify_default(obj):
assert_acceptable_types(obj)
verify_acceptable_types(obj)
verify_value = verify_default
def verify(obj):
if not verify_nullability(obj):
verify_value(obj)
return verify
|
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] |
Make a verifier that checks the type of obj against dataType and raises a TypeError if they do
not match.
This verifier also checks the value of obj against datatype and raises a ValueError if it's not
within the allowed range, e.g. using 128 as ByteType will overflow. Note that, Python float is
not checked, so it will become infinity when cast to Java float if it overflows.
>>> _make_type_verifier(StructType([]))(None)
>>> _make_type_verifier(StringType())("")
>>> _make_type_verifier(LongType())(0)
>>> _make_type_verifier(ArrayType(ShortType()))(list(range(3)))
>>> _make_type_verifier(ArrayType(StringType()))(set()) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
TypeError:...
>>> _make_type_verifier(MapType(StringType(), IntegerType()))({})
>>> _make_type_verifier(StructType([]))(())
>>> _make_type_verifier(StructType([]))([])
>>> _make_type_verifier(StructType([]))([1]) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> # Check if numeric values are within the allowed range.
>>> _make_type_verifier(ByteType())(12)
>>> _make_type_verifier(ByteType())(1234) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(ByteType(), False)(None) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(
... ArrayType(ShortType(), False))([1, None]) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
>>> _make_type_verifier(MapType(StringType(), IntegerType()))({None: 1})
Traceback (most recent call last):
...
ValueError:...
>>> schema = StructType().add("a", IntegerType()).add("b", StringType(), False)
>>> _make_type_verifier(schema)((1, None)) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValueError:...
|
[
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"a",
"verifier",
"that",
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"against",
"dataType",
"and",
"raises",
"a",
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"do",
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] |
618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/types.py#L1202-L1391
|
train
|
Returns a verifier that checks the type of obj against dataType and raises a TypeError if they do not match.
|
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apache/spark
|
python/pyspark/rdd.py
|
RDD.countApproxDistinct
|
def countApproxDistinct(self, relativeSD=0.05):
"""
.. note:: Experimental
Return approximate number of distinct elements in the RDD.
The algorithm used is based on streamlib's implementation of
`"HyperLogLog in Practice: Algorithmic Engineering of a State
of The Art Cardinality Estimation Algorithm", available here
<https://doi.org/10.1145/2452376.2452456>`_.
:param relativeSD: Relative accuracy. Smaller values create
counters that require more space.
It must be greater than 0.000017.
>>> n = sc.parallelize(range(1000)).map(str).countApproxDistinct()
>>> 900 < n < 1100
True
>>> n = sc.parallelize([i % 20 for i in range(1000)]).countApproxDistinct()
>>> 16 < n < 24
True
"""
if relativeSD < 0.000017:
raise ValueError("relativeSD should be greater than 0.000017")
# the hash space in Java is 2^32
hashRDD = self.map(lambda x: portable_hash(x) & 0xFFFFFFFF)
return hashRDD._to_java_object_rdd().countApproxDistinct(relativeSD)
|
python
|
def countApproxDistinct(self, relativeSD=0.05):
"""
.. note:: Experimental
Return approximate number of distinct elements in the RDD.
The algorithm used is based on streamlib's implementation of
`"HyperLogLog in Practice: Algorithmic Engineering of a State
of The Art Cardinality Estimation Algorithm", available here
<https://doi.org/10.1145/2452376.2452456>`_.
:param relativeSD: Relative accuracy. Smaller values create
counters that require more space.
It must be greater than 0.000017.
>>> n = sc.parallelize(range(1000)).map(str).countApproxDistinct()
>>> 900 < n < 1100
True
>>> n = sc.parallelize([i % 20 for i in range(1000)]).countApproxDistinct()
>>> 16 < n < 24
True
"""
if relativeSD < 0.000017:
raise ValueError("relativeSD should be greater than 0.000017")
# the hash space in Java is 2^32
hashRDD = self.map(lambda x: portable_hash(x) & 0xFFFFFFFF)
return hashRDD._to_java_object_rdd().countApproxDistinct(relativeSD)
|
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.. note:: Experimental
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`"HyperLogLog in Practice: Algorithmic Engineering of a State
of The Art Cardinality Estimation Algorithm", available here
<https://doi.org/10.1145/2452376.2452456>`_.
:param relativeSD: Relative accuracy. Smaller values create
counters that require more space.
It must be greater than 0.000017.
>>> n = sc.parallelize(range(1000)).map(str).countApproxDistinct()
>>> 900 < n < 1100
True
>>> n = sc.parallelize([i % 20 for i in range(1000)]).countApproxDistinct()
>>> 16 < n < 24
True
|
[
"..",
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] |
618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L2350-L2376
|
train
|
Return approximate number of distinct elements in the RDD.
|
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apache/spark
|
python/pyspark/sql/readwriter.py
|
DataFrameReader.load
|
def load(self, path=None, format=None, schema=None, **options):
"""Loads data from a data source and returns it as a :class`DataFrame`.
:param path: optional string or a list of string for file-system backed data sources.
:param format: optional string for format of the data source. Default to 'parquet'.
:param schema: optional :class:`pyspark.sql.types.StructType` for the input schema
or a DDL-formatted string (For example ``col0 INT, col1 DOUBLE``).
:param options: all other string options
>>> df = spark.read.format("parquet").load('python/test_support/sql/parquet_partitioned',
... opt1=True, opt2=1, opt3='str')
>>> df.dtypes
[('name', 'string'), ('year', 'int'), ('month', 'int'), ('day', 'int')]
>>> df = spark.read.format('json').load(['python/test_support/sql/people.json',
... 'python/test_support/sql/people1.json'])
>>> df.dtypes
[('age', 'bigint'), ('aka', 'string'), ('name', 'string')]
"""
if format is not None:
self.format(format)
if schema is not None:
self.schema(schema)
self.options(**options)
if isinstance(path, basestring):
return self._df(self._jreader.load(path))
elif path is not None:
if type(path) != list:
path = [path]
return self._df(self._jreader.load(self._spark._sc._jvm.PythonUtils.toSeq(path)))
else:
return self._df(self._jreader.load())
|
python
|
def load(self, path=None, format=None, schema=None, **options):
"""Loads data from a data source and returns it as a :class`DataFrame`.
:param path: optional string or a list of string for file-system backed data sources.
:param format: optional string for format of the data source. Default to 'parquet'.
:param schema: optional :class:`pyspark.sql.types.StructType` for the input schema
or a DDL-formatted string (For example ``col0 INT, col1 DOUBLE``).
:param options: all other string options
>>> df = spark.read.format("parquet").load('python/test_support/sql/parquet_partitioned',
... opt1=True, opt2=1, opt3='str')
>>> df.dtypes
[('name', 'string'), ('year', 'int'), ('month', 'int'), ('day', 'int')]
>>> df = spark.read.format('json').load(['python/test_support/sql/people.json',
... 'python/test_support/sql/people1.json'])
>>> df.dtypes
[('age', 'bigint'), ('aka', 'string'), ('name', 'string')]
"""
if format is not None:
self.format(format)
if schema is not None:
self.schema(schema)
self.options(**options)
if isinstance(path, basestring):
return self._df(self._jreader.load(path))
elif path is not None:
if type(path) != list:
path = [path]
return self._df(self._jreader.load(self._spark._sc._jvm.PythonUtils.toSeq(path)))
else:
return self._df(self._jreader.load())
|
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:param schema: optional :class:`pyspark.sql.types.StructType` for the input schema
or a DDL-formatted string (For example ``col0 INT, col1 DOUBLE``).
:param options: all other string options
>>> df = spark.read.format("parquet").load('python/test_support/sql/parquet_partitioned',
... opt1=True, opt2=1, opt3='str')
>>> df.dtypes
[('name', 'string'), ('year', 'int'), ('month', 'int'), ('day', 'int')]
>>> df = spark.read.format('json').load(['python/test_support/sql/people.json',
... 'python/test_support/sql/people1.json'])
>>> df.dtypes
[('age', 'bigint'), ('aka', 'string'), ('name', 'string')]
|
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] |
618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/readwriter.py#L141-L172
|
train
|
Loads data from a file - system backed data source and returns it as a : class : DataFrame.
|
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huggingface/pytorch-pretrained-BERT
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examples/run_classifier.py
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DataProcessor._read_tsv
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def _read_tsv(cls, input_file, quotechar=None):
"""Reads a tab separated value file."""
with open(input_file, "r", encoding="utf-8") as f:
reader = csv.reader(f, delimiter="\t", quotechar=quotechar)
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for line in reader:
if sys.version_info[0] == 2:
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lines.append(line)
return lines
|
python
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def _read_tsv(cls, input_file, quotechar=None):
"""Reads a tab separated value file."""
with open(input_file, "r", encoding="utf-8") as f:
reader = csv.reader(f, delimiter="\t", quotechar=quotechar)
lines = []
for line in reader:
if sys.version_info[0] == 2:
line = list(unicode(cell, 'utf-8') for cell in line)
lines.append(line)
return lines
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b832d5bb8a6dfc5965015b828e577677eace601e
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https://github.com/huggingface/pytorch-pretrained-BERT/blob/b832d5bb8a6dfc5965015b828e577677eace601e/examples/run_classifier.py#L93-L102
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ageitgey/face_recognition
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face_recognition/api.py
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_rect_to_css
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def _rect_to_css(rect):
"""
Convert a dlib 'rect' object to a plain tuple in (top, right, bottom, left) order
:param rect: a dlib 'rect' object
:return: a plain tuple representation of the rect in (top, right, bottom, left) order
"""
return rect.top(), rect.right(), rect.bottom(), rect.left()
|
python
|
def _rect_to_css(rect):
"""
Convert a dlib 'rect' object to a plain tuple in (top, right, bottom, left) order
:param rect: a dlib 'rect' object
:return: a plain tuple representation of the rect in (top, right, bottom, left) order
"""
return rect.top(), rect.right(), rect.bottom(), rect.left()
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Convert a dlib 'rect' object to a plain tuple in (top, right, bottom, left) order
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c96b010c02f15e8eeb0f71308c641179ac1f19bb
|
https://github.com/ageitgey/face_recognition/blob/c96b010c02f15e8eeb0f71308c641179ac1f19bb/face_recognition/api.py#L32-L39
|
train
|
Convert a dlib rect object to a plain tuple in ( top right bottom left
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apache/spark
|
python/pyspark/sql/functions.py
|
conv
|
def conv(col, fromBase, toBase):
"""
Convert a number in a string column from one base to another.
>>> df = spark.createDataFrame([("010101",)], ['n'])
>>> df.select(conv(df.n, 2, 16).alias('hex')).collect()
[Row(hex=u'15')]
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.conv(_to_java_column(col), fromBase, toBase))
|
python
|
def conv(col, fromBase, toBase):
"""
Convert a number in a string column from one base to another.
>>> df = spark.createDataFrame([("010101",)], ['n'])
>>> df.select(conv(df.n, 2, 16).alias('hex')).collect()
[Row(hex=u'15')]
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.conv(_to_java_column(col), fromBase, toBase))
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Convert a number in a string column from one base to another.
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>>> df.select(conv(df.n, 2, 16).alias('hex')).collect()
[Row(hex=u'15')]
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L810-L819
|
train
|
Convert a number in a string column from one base to another.
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pandas-dev/pandas
|
pandas/core/missing.py
|
mask_missing
|
def mask_missing(arr, values_to_mask):
"""
Return a masking array of same size/shape as arr
with entries equaling any member of values_to_mask set to True
"""
dtype, values_to_mask = infer_dtype_from_array(values_to_mask)
try:
values_to_mask = np.array(values_to_mask, dtype=dtype)
except Exception:
values_to_mask = np.array(values_to_mask, dtype=object)
na_mask = isna(values_to_mask)
nonna = values_to_mask[~na_mask]
mask = None
for x in nonna:
if mask is None:
# numpy elementwise comparison warning
if is_numeric_v_string_like(arr, x):
mask = False
else:
mask = arr == x
# if x is a string and arr is not, then we get False and we must
# expand the mask to size arr.shape
if is_scalar(mask):
mask = np.zeros(arr.shape, dtype=bool)
else:
# numpy elementwise comparison warning
if is_numeric_v_string_like(arr, x):
mask |= False
else:
mask |= arr == x
if na_mask.any():
if mask is None:
mask = isna(arr)
else:
mask |= isna(arr)
# GH 21977
if mask is None:
mask = np.zeros(arr.shape, dtype=bool)
return mask
|
python
|
def mask_missing(arr, values_to_mask):
"""
Return a masking array of same size/shape as arr
with entries equaling any member of values_to_mask set to True
"""
dtype, values_to_mask = infer_dtype_from_array(values_to_mask)
try:
values_to_mask = np.array(values_to_mask, dtype=dtype)
except Exception:
values_to_mask = np.array(values_to_mask, dtype=object)
na_mask = isna(values_to_mask)
nonna = values_to_mask[~na_mask]
mask = None
for x in nonna:
if mask is None:
# numpy elementwise comparison warning
if is_numeric_v_string_like(arr, x):
mask = False
else:
mask = arr == x
# if x is a string and arr is not, then we get False and we must
# expand the mask to size arr.shape
if is_scalar(mask):
mask = np.zeros(arr.shape, dtype=bool)
else:
# numpy elementwise comparison warning
if is_numeric_v_string_like(arr, x):
mask |= False
else:
mask |= arr == x
if na_mask.any():
if mask is None:
mask = isna(arr)
else:
mask |= isna(arr)
# GH 21977
if mask is None:
mask = np.zeros(arr.shape, dtype=bool)
return mask
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/missing.py#L18-L66
|
train
|
Return a masking array of same size / shape as arr
Addon with entries equaling any member of values_to_mask set to True
Addon
|
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pandas-dev/pandas
|
pandas/core/indexes/base.py
|
Index.difference
|
def difference(self, other, sort=None):
"""
Return a new Index with elements from the index that are not in
`other`.
This is the set difference of two Index objects.
Parameters
----------
other : Index or array-like
sort : False or None, default None
Whether to sort the resulting index. By default, the
values are attempted to be sorted, but any TypeError from
incomparable elements is caught by pandas.
* None : Attempt to sort the result, but catch any TypeErrors
from comparing incomparable elements.
* False : Do not sort the result.
.. versionadded:: 0.24.0
.. versionchanged:: 0.24.1
Changed the default value from ``True`` to ``None``
(without change in behaviour).
Returns
-------
difference : Index
Examples
--------
>>> idx1 = pd.Index([2, 1, 3, 4])
>>> idx2 = pd.Index([3, 4, 5, 6])
>>> idx1.difference(idx2)
Int64Index([1, 2], dtype='int64')
>>> idx1.difference(idx2, sort=False)
Int64Index([2, 1], dtype='int64')
"""
self._validate_sort_keyword(sort)
self._assert_can_do_setop(other)
if self.equals(other):
# pass an empty np.ndarray with the appropriate dtype
return self._shallow_copy(self._data[:0])
other, result_name = self._convert_can_do_setop(other)
this = self._get_unique_index()
indexer = this.get_indexer(other)
indexer = indexer.take((indexer != -1).nonzero()[0])
label_diff = np.setdiff1d(np.arange(this.size), indexer,
assume_unique=True)
the_diff = this.values.take(label_diff)
if sort is None:
try:
the_diff = sorting.safe_sort(the_diff)
except TypeError:
pass
return this._shallow_copy(the_diff, name=result_name, freq=None)
|
python
|
def difference(self, other, sort=None):
"""
Return a new Index with elements from the index that are not in
`other`.
This is the set difference of two Index objects.
Parameters
----------
other : Index or array-like
sort : False or None, default None
Whether to sort the resulting index. By default, the
values are attempted to be sorted, but any TypeError from
incomparable elements is caught by pandas.
* None : Attempt to sort the result, but catch any TypeErrors
from comparing incomparable elements.
* False : Do not sort the result.
.. versionadded:: 0.24.0
.. versionchanged:: 0.24.1
Changed the default value from ``True`` to ``None``
(without change in behaviour).
Returns
-------
difference : Index
Examples
--------
>>> idx1 = pd.Index([2, 1, 3, 4])
>>> idx2 = pd.Index([3, 4, 5, 6])
>>> idx1.difference(idx2)
Int64Index([1, 2], dtype='int64')
>>> idx1.difference(idx2, sort=False)
Int64Index([2, 1], dtype='int64')
"""
self._validate_sort_keyword(sort)
self._assert_can_do_setop(other)
if self.equals(other):
# pass an empty np.ndarray with the appropriate dtype
return self._shallow_copy(self._data[:0])
other, result_name = self._convert_can_do_setop(other)
this = self._get_unique_index()
indexer = this.get_indexer(other)
indexer = indexer.take((indexer != -1).nonzero()[0])
label_diff = np.setdiff1d(np.arange(this.size), indexer,
assume_unique=True)
the_diff = this.values.take(label_diff)
if sort is None:
try:
the_diff = sorting.safe_sort(the_diff)
except TypeError:
pass
return this._shallow_copy(the_diff, name=result_name, freq=None)
|
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Parameters
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other : Index or array-like
sort : False or None, default None
Whether to sort the resulting index. By default, the
values are attempted to be sorted, but any TypeError from
incomparable elements is caught by pandas.
* None : Attempt to sort the result, but catch any TypeErrors
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* False : Do not sort the result.
.. versionadded:: 0.24.0
.. versionchanged:: 0.24.1
Changed the default value from ``True`` to ``None``
(without change in behaviour).
Returns
-------
difference : Index
Examples
--------
>>> idx1 = pd.Index([2, 1, 3, 4])
>>> idx2 = pd.Index([3, 4, 5, 6])
>>> idx1.difference(idx2)
Int64Index([1, 2], dtype='int64')
>>> idx1.difference(idx2, sort=False)
Int64Index([2, 1], dtype='int64')
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L2441-L2504
|
train
|
Return a new Index with elements from the index that are not in the other.
|
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|
python/pyspark/rdd.py
|
RDD.foldByKey
|
def foldByKey(self, zeroValue, func, numPartitions=None, partitionFunc=portable_hash):
"""
Merge the values for each key using an associative function "func"
and a neutral "zeroValue" which may be added to the result an
arbitrary number of times, and must not change the result
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>>> rdd = sc.parallelize([("a", 1), ("b", 1), ("a", 1)])
>>> from operator import add
>>> sorted(rdd.foldByKey(0, add).collect())
[('a', 2), ('b', 1)]
"""
def createZero():
return copy.deepcopy(zeroValue)
return self.combineByKey(lambda v: func(createZero(), v), func, func, numPartitions,
partitionFunc)
|
python
|
def foldByKey(self, zeroValue, func, numPartitions=None, partitionFunc=portable_hash):
"""
Merge the values for each key using an associative function "func"
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>>> rdd = sc.parallelize([("a", 1), ("b", 1), ("a", 1)])
>>> from operator import add
>>> sorted(rdd.foldByKey(0, add).collect())
[('a', 2), ('b', 1)]
"""
def createZero():
return copy.deepcopy(zeroValue)
return self.combineByKey(lambda v: func(createZero(), v), func, func, numPartitions,
partitionFunc)
|
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>>> rdd = sc.parallelize([("a", 1), ("b", 1), ("a", 1)])
>>> from operator import add
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[('a', 2), ('b', 1)]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L1893-L1909
|
train
|
Return a new table with the values for each key in the table grouped by func.
|
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python/pyspark/streaming/context.py
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StreamingContext.binaryRecordsStream
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def binaryRecordsStream(self, directory, recordLength):
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Create an input stream that monitors a Hadoop-compatible file system
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return DStream(self._jssc.binaryRecordsStream(directory, recordLength), self,
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|
python
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def binaryRecordsStream(self, directory, recordLength):
"""
Create an input stream that monitors a Hadoop-compatible file system
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618d6bff71073c8c93501ab7392c3cc579730f0b
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train
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apache/spark
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python/pyspark/ml/param/__init__.py
|
TypeConverters.toVector
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def toVector(value):
"""
Convert a value to a MLlib Vector, if possible.
"""
if isinstance(value, Vector):
return value
elif TypeConverters._can_convert_to_list(value):
value = TypeConverters.toList(value)
if all(map(lambda v: TypeConverters._is_numeric(v), value)):
return DenseVector(value)
raise TypeError("Could not convert %s to vector" % value)
|
python
|
def toVector(value):
"""
Convert a value to a MLlib Vector, if possible.
"""
if isinstance(value, Vector):
return value
elif TypeConverters._can_convert_to_list(value):
value = TypeConverters.toList(value)
if all(map(lambda v: TypeConverters._is_numeric(v), value)):
return DenseVector(value)
raise TypeError("Could not convert %s to vector" % value)
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/ml/param/__init__.py#L160-L170
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train
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python/pyspark/sql/dataframe.py
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DataFrame.persist
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def persist(self, storageLevel=StorageLevel.MEMORY_AND_DISK):
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self.is_cached = True
javaStorageLevel = self._sc._getJavaStorageLevel(storageLevel)
self._jdf.persist(javaStorageLevel)
return self
|
python
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def persist(self, storageLevel=StorageLevel.MEMORY_AND_DISK):
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"""
self.is_cached = True
javaStorageLevel = self._sc._getJavaStorageLevel(storageLevel)
self._jdf.persist(javaStorageLevel)
return self
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618d6bff71073c8c93501ab7392c3cc579730f0b
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pandas-dev/pandas
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pandas/core/indexes/base.py
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Index._coerce_scalar_to_index
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def _coerce_scalar_to_index(self, item):
"""
We need to coerce a scalar to a compat for our index type.
Parameters
----------
item : scalar item to coerce
"""
dtype = self.dtype
if self._is_numeric_dtype and isna(item):
# We can't coerce to the numeric dtype of "self" (unless
# it's float) if there are NaN values in our output.
dtype = None
return Index([item], dtype=dtype, **self._get_attributes_dict())
|
python
|
def _coerce_scalar_to_index(self, item):
"""
We need to coerce a scalar to a compat for our index type.
Parameters
----------
item : scalar item to coerce
"""
dtype = self.dtype
if self._is_numeric_dtype and isna(item):
# We can't coerce to the numeric dtype of "self" (unless
# it's float) if there are NaN values in our output.
dtype = None
return Index([item], dtype=dtype, **self._get_attributes_dict())
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L3823-L3838
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apache/spark
|
sql/gen-sql-markdown.py
|
_make_pretty_deprecated
|
def _make_pretty_deprecated(deprecated):
"""
Makes the deprecated description pretty and returns a formatted string if `deprecated`
is not an empty string. Otherwise, returns None.
Expected input:
...
Expected output:
**Deprecated:**
...
"""
if deprecated != "":
deprecated = "\n".join(map(lambda n: n[4:], deprecated.split("\n")))
return "**Deprecated:**\n%s\n" % deprecated
|
python
|
def _make_pretty_deprecated(deprecated):
"""
Makes the deprecated description pretty and returns a formatted string if `deprecated`
is not an empty string. Otherwise, returns None.
Expected input:
...
Expected output:
**Deprecated:**
...
"""
if deprecated != "":
deprecated = "\n".join(map(lambda n: n[4:], deprecated.split("\n")))
return "**Deprecated:**\n%s\n" % deprecated
|
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**Deprecated:**
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|
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] |
618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/sql/gen-sql-markdown.py#L140-L158
|
train
|
Makes the deprecated description pretty and returns a formatted string.
|
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apache/spark
|
python/pyspark/sql/functions.py
|
from_csv
|
def from_csv(col, schema, options={}):
"""
Parses a column containing a CSV string to a row with the specified schema.
Returns `null`, in the case of an unparseable string.
:param col: string column in CSV format
:param schema: a string with schema in DDL format to use when parsing the CSV column.
:param options: options to control parsing. accepts the same options as the CSV datasource
>>> data = [("1,2,3",)]
>>> df = spark.createDataFrame(data, ("value",))
>>> df.select(from_csv(df.value, "a INT, b INT, c INT").alias("csv")).collect()
[Row(csv=Row(a=1, b=2, c=3))]
>>> value = data[0][0]
>>> df.select(from_csv(df.value, schema_of_csv(value)).alias("csv")).collect()
[Row(csv=Row(_c0=1, _c1=2, _c2=3))]
"""
sc = SparkContext._active_spark_context
if isinstance(schema, basestring):
schema = _create_column_from_literal(schema)
elif isinstance(schema, Column):
schema = _to_java_column(schema)
else:
raise TypeError("schema argument should be a column or string")
jc = sc._jvm.functions.from_csv(_to_java_column(col), schema, options)
return Column(jc)
|
python
|
def from_csv(col, schema, options={}):
"""
Parses a column containing a CSV string to a row with the specified schema.
Returns `null`, in the case of an unparseable string.
:param col: string column in CSV format
:param schema: a string with schema in DDL format to use when parsing the CSV column.
:param options: options to control parsing. accepts the same options as the CSV datasource
>>> data = [("1,2,3",)]
>>> df = spark.createDataFrame(data, ("value",))
>>> df.select(from_csv(df.value, "a INT, b INT, c INT").alias("csv")).collect()
[Row(csv=Row(a=1, b=2, c=3))]
>>> value = data[0][0]
>>> df.select(from_csv(df.value, schema_of_csv(value)).alias("csv")).collect()
[Row(csv=Row(_c0=1, _c1=2, _c2=3))]
"""
sc = SparkContext._active_spark_context
if isinstance(schema, basestring):
schema = _create_column_from_literal(schema)
elif isinstance(schema, Column):
schema = _to_java_column(schema)
else:
raise TypeError("schema argument should be a column or string")
jc = sc._jvm.functions.from_csv(_to_java_column(col), schema, options)
return Column(jc)
|
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>>> data = [("1,2,3",)]
>>> df = spark.createDataFrame(data, ("value",))
>>> df.select(from_csv(df.value, "a INT, b INT, c INT").alias("csv")).collect()
[Row(csv=Row(a=1, b=2, c=3))]
>>> value = data[0][0]
>>> df.select(from_csv(df.value, schema_of_csv(value)).alias("csv")).collect()
[Row(csv=Row(_c0=1, _c1=2, _c2=3))]
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L2762-L2789
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train
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Parses a column containing a CSV string to a row with the specified schema.
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pandas-dev/pandas
|
pandas/core/indexes/base.py
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Index.summary
|
def summary(self, name=None):
"""
Return a summarized representation.
.. deprecated:: 0.23.0
"""
warnings.warn("'summary' is deprecated and will be removed in a "
"future version.", FutureWarning, stacklevel=2)
return self._summary(name)
|
python
|
def summary(self, name=None):
"""
Return a summarized representation.
.. deprecated:: 0.23.0
"""
warnings.warn("'summary' is deprecated and will be removed in a "
"future version.", FutureWarning, stacklevel=2)
return self._summary(name)
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L1090-L1098
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train
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Return a summarized representation of the current object.
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pandas-dev/pandas
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pandas/core/window.py
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Rolling._validate_monotonic
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def _validate_monotonic(self):
"""
Validate on is_monotonic.
"""
if not self._on.is_monotonic:
formatted = self.on or 'index'
raise ValueError("{0} must be "
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|
python
|
def _validate_monotonic(self):
"""
Validate on is_monotonic.
"""
if not self._on.is_monotonic:
formatted = self.on or 'index'
raise ValueError("{0} must be "
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/window.py#L1602-L1609
|
train
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apache/spark
|
python/pyspark/context.py
|
SparkContext.runJob
|
def runJob(self, rdd, partitionFunc, partitions=None, allowLocal=False):
"""
Executes the given partitionFunc on the specified set of partitions,
returning the result as an array of elements.
If 'partitions' is not specified, this will run over all partitions.
>>> myRDD = sc.parallelize(range(6), 3)
>>> sc.runJob(myRDD, lambda part: [x * x for x in part])
[0, 1, 4, 9, 16, 25]
>>> myRDD = sc.parallelize(range(6), 3)
>>> sc.runJob(myRDD, lambda part: [x * x for x in part], [0, 2], True)
[0, 1, 16, 25]
"""
if partitions is None:
partitions = range(rdd._jrdd.partitions().size())
# Implementation note: This is implemented as a mapPartitions followed
# by runJob() in order to avoid having to pass a Python lambda into
# SparkContext#runJob.
mappedRDD = rdd.mapPartitions(partitionFunc)
sock_info = self._jvm.PythonRDD.runJob(self._jsc.sc(), mappedRDD._jrdd, partitions)
return list(_load_from_socket(sock_info, mappedRDD._jrdd_deserializer))
|
python
|
def runJob(self, rdd, partitionFunc, partitions=None, allowLocal=False):
"""
Executes the given partitionFunc on the specified set of partitions,
returning the result as an array of elements.
If 'partitions' is not specified, this will run over all partitions.
>>> myRDD = sc.parallelize(range(6), 3)
>>> sc.runJob(myRDD, lambda part: [x * x for x in part])
[0, 1, 4, 9, 16, 25]
>>> myRDD = sc.parallelize(range(6), 3)
>>> sc.runJob(myRDD, lambda part: [x * x for x in part], [0, 2], True)
[0, 1, 16, 25]
"""
if partitions is None:
partitions = range(rdd._jrdd.partitions().size())
# Implementation note: This is implemented as a mapPartitions followed
# by runJob() in order to avoid having to pass a Python lambda into
# SparkContext#runJob.
mappedRDD = rdd.mapPartitions(partitionFunc)
sock_info = self._jvm.PythonRDD.runJob(self._jsc.sc(), mappedRDD._jrdd, partitions)
return list(_load_from_socket(sock_info, mappedRDD._jrdd_deserializer))
|
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[0, 1, 4, 9, 16, 25]
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[0, 1, 16, 25]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/context.py#L1052-L1075
|
train
|
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|
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|
pytorch_pretrained_bert/modeling_openai.py
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OpenAIGPTModel.set_num_special_tokens
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def set_num_special_tokens(self, num_special_tokens):
" Update input embeddings with new embedding matrice if needed "
if self.config.n_special == num_special_tokens:
return
# Update config
self.config.n_special = num_special_tokens
# Build new embeddings and initialize all new embeddings (in particular the special tokens)
old_embed = self.tokens_embed
self.tokens_embed = nn.Embedding(self.config.total_tokens_embeddings, self.config.n_embd)
self.tokens_embed.to(old_embed.weight.device)
self.init_weights(self.tokens_embed)
# Copy word embeddings from the previous weights
self.tokens_embed.weight.data[:self.config.vocab_size, :] = old_embed.weight.data[:self.config.vocab_size, :]
|
python
|
def set_num_special_tokens(self, num_special_tokens):
" Update input embeddings with new embedding matrice if needed "
if self.config.n_special == num_special_tokens:
return
# Update config
self.config.n_special = num_special_tokens
# Build new embeddings and initialize all new embeddings (in particular the special tokens)
old_embed = self.tokens_embed
self.tokens_embed = nn.Embedding(self.config.total_tokens_embeddings, self.config.n_embd)
self.tokens_embed.to(old_embed.weight.device)
self.init_weights(self.tokens_embed)
# Copy word embeddings from the previous weights
self.tokens_embed.weight.data[:self.config.vocab_size, :] = old_embed.weight.data[:self.config.vocab_size, :]
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b832d5bb8a6dfc5965015b828e577677eace601e
|
https://github.com/huggingface/pytorch-pretrained-BERT/blob/b832d5bb8a6dfc5965015b828e577677eace601e/pytorch_pretrained_bert/modeling_openai.py#L605-L617
|
train
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Update input embeddings with new embedding matrice if needed
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pandas-dev/pandas
|
pandas/core/indexes/base.py
|
Index.format
|
def format(self, name=False, formatter=None, **kwargs):
"""
Render a string representation of the Index.
"""
header = []
if name:
header.append(pprint_thing(self.name,
escape_chars=('\t', '\r', '\n')) if
self.name is not None else '')
if formatter is not None:
return header + list(self.map(formatter))
return self._format_with_header(header, **kwargs)
|
python
|
def format(self, name=False, formatter=None, **kwargs):
"""
Render a string representation of the Index.
"""
header = []
if name:
header.append(pprint_thing(self.name,
escape_chars=('\t', '\r', '\n')) if
self.name is not None else '')
if formatter is not None:
return header + list(self.map(formatter))
return self._format_with_header(header, **kwargs)
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python/pyspark/sql/session.py
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SparkSession.catalog
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apache/spark
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python/pyspark/mllib/linalg/__init__.py
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DenseMatrix.toArray
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def toArray(self):
"""
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>>> m.toArray()
array([[ 0., 2.],
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"""
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|
python
|
def toArray(self):
"""
Return an numpy.ndarray
>>> m = DenseMatrix(2, 2, range(4))
>>> m.toArray()
array([[ 0., 2.],
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"""
if self.isTransposed:
return np.asfortranarray(
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/mllib/linalg/__init__.py#L1082-L1095
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train
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pandas-dev/pandas
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pandas/core/indexes/base.py
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Index.putmask
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def putmask(self, mask, value):
"""
Return a new Index of the values set with the mask.
See Also
--------
numpy.ndarray.putmask
"""
values = self.values.copy()
try:
np.putmask(values, mask, self._convert_for_op(value))
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except (ValueError, TypeError) as err:
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raise err
# coerces to object
return self.astype(object).putmask(mask, value)
|
python
|
def putmask(self, mask, value):
"""
Return a new Index of the values set with the mask.
See Also
--------
numpy.ndarray.putmask
"""
values = self.values.copy()
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np.putmask(values, mask, self._convert_for_op(value))
return self._shallow_copy(values)
except (ValueError, TypeError) as err:
if is_object_dtype(self):
raise err
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return self.astype(object).putmask(mask, value)
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L4025-L4042
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train
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Put a value into the Index of the values set with the mask.
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pandas-dev/pandas
|
pandas/core/indexes/base.py
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Index._format_native_types
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def _format_native_types(self, na_rep='', quoting=None, **kwargs):
"""
Actually format specific types of the index.
"""
mask = isna(self)
if not self.is_object() and not quoting:
values = np.asarray(self).astype(str)
else:
values = np.array(self, dtype=object, copy=True)
values[mask] = na_rep
return values
|
python
|
def _format_native_types(self, na_rep='', quoting=None, **kwargs):
"""
Actually format specific types of the index.
"""
mask = isna(self)
if not self.is_object() and not quoting:
values = np.asarray(self).astype(str)
else:
values = np.array(self, dtype=object, copy=True)
values[mask] = na_rep
return values
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L1048-L1059
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Format the native types of the index.
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python/pyspark/mllib/clustering.py
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StreamingKMeans.setHalfLife
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def setHalfLife(self, halfLife, timeUnit):
"""
Set number of batches after which the centroids of that
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self._timeUnit = timeUnit
self._decayFactor = exp(log(0.5) / halfLife)
return self
|
python
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def setHalfLife(self, halfLife, timeUnit):
"""
Set number of batches after which the centroids of that
particular batch has half the weightage.
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self._timeUnit = timeUnit
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return self
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python/pyspark/rdd.py
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RDD.foreachPartition
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def foreachPartition(self, f):
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self.mapPartitions(func).count()
|
python
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def foreachPartition(self, f):
"""
Applies a function to each partition of this RDD.
>>> def f(iterator):
... for x in iterator:
... print(x)
>>> sc.parallelize([1, 2, 3, 4, 5]).foreachPartition(f)
"""
def func(it):
r = f(it)
try:
return iter(r)
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self.mapPartitions(func).count()
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L793-L808
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train
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huggingface/pytorch-pretrained-BERT
|
pytorch_pretrained_bert/tokenization.py
|
BasicTokenizer._run_strip_accents
|
def _run_strip_accents(self, text):
"""Strips accents from a piece of text."""
text = unicodedata.normalize("NFD", text)
output = []
for char in text:
cat = unicodedata.category(char)
if cat == "Mn":
continue
output.append(char)
return "".join(output)
|
python
|
def _run_strip_accents(self, text):
"""Strips accents from a piece of text."""
text = unicodedata.normalize("NFD", text)
output = []
for char in text:
cat = unicodedata.category(char)
if cat == "Mn":
continue
output.append(char)
return "".join(output)
|
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b832d5bb8a6dfc5965015b828e577677eace601e
|
https://github.com/huggingface/pytorch-pretrained-BERT/blob/b832d5bb8a6dfc5965015b828e577677eace601e/pytorch_pretrained_bert/tokenization.py#L236-L245
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train
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Strips accents from a piece of text.
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apache/spark
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python/pyspark/sql/catalog.py
|
Catalog.createExternalTable
|
def createExternalTable(self, tableName, path=None, source=None, schema=None, **options):
"""Creates a table based on the dataset in a data source.
It returns the DataFrame associated with the external table.
The data source is specified by the ``source`` and a set of ``options``.
If ``source`` is not specified, the default data source configured by
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Optionally, a schema can be provided as the schema of the returned :class:`DataFrame` and
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:return: :class:`DataFrame`
"""
warnings.warn(
"createExternalTable is deprecated since Spark 2.2, please use createTable instead.",
DeprecationWarning)
return self.createTable(tableName, path, source, schema, **options)
|
python
|
def createExternalTable(self, tableName, path=None, source=None, schema=None, **options):
"""Creates a table based on the dataset in a data source.
It returns the DataFrame associated with the external table.
The data source is specified by the ``source`` and a set of ``options``.
If ``source`` is not specified, the default data source configured by
``spark.sql.sources.default`` will be used.
Optionally, a schema can be provided as the schema of the returned :class:`DataFrame` and
created external table.
:return: :class:`DataFrame`
"""
warnings.warn(
"createExternalTable is deprecated since Spark 2.2, please use createTable instead.",
DeprecationWarning)
return self.createTable(tableName, path, source, schema, **options)
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/catalog.py#L142-L159
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train
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Creates an external table based on the dataset in a data source.
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apache/spark
|
python/pyspark/sql/types.py
|
_parse_datatype_string
|
def _parse_datatype_string(s):
"""
Parses the given data type string to a :class:`DataType`. The data type string format equals
to :class:`DataType.simpleString`, except that top level struct type can omit
the ``struct<>`` and atomic types use ``typeName()`` as their format, e.g. use ``byte`` instead
of ``tinyint`` for :class:`ByteType`. We can also use ``int`` as a short name
for :class:`IntegerType`. Since Spark 2.3, this also supports a schema in a DDL-formatted
string and case-insensitive strings.
>>> _parse_datatype_string("int ")
IntegerType
>>> _parse_datatype_string("INT ")
IntegerType
>>> _parse_datatype_string("a: byte, b: decimal( 16 , 8 ) ")
StructType(List(StructField(a,ByteType,true),StructField(b,DecimalType(16,8),true)))
>>> _parse_datatype_string("a DOUBLE, b STRING")
StructType(List(StructField(a,DoubleType,true),StructField(b,StringType,true)))
>>> _parse_datatype_string("a: array< short>")
StructType(List(StructField(a,ArrayType(ShortType,true),true)))
>>> _parse_datatype_string(" map<string , string > ")
MapType(StringType,StringType,true)
>>> # Error cases
>>> _parse_datatype_string("blabla") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("a: int,") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("array<int") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("map<int, boolean>>") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
"""
sc = SparkContext._active_spark_context
def from_ddl_schema(type_str):
return _parse_datatype_json_string(
sc._jvm.org.apache.spark.sql.types.StructType.fromDDL(type_str).json())
def from_ddl_datatype(type_str):
return _parse_datatype_json_string(
sc._jvm.org.apache.spark.sql.api.python.PythonSQLUtils.parseDataType(type_str).json())
try:
# DDL format, "fieldname datatype, fieldname datatype".
return from_ddl_schema(s)
except Exception as e:
try:
# For backwards compatibility, "integer", "struct<fieldname: datatype>" and etc.
return from_ddl_datatype(s)
except:
try:
# For backwards compatibility, "fieldname: datatype, fieldname: datatype" case.
return from_ddl_datatype("struct<%s>" % s.strip())
except:
raise e
|
python
|
def _parse_datatype_string(s):
"""
Parses the given data type string to a :class:`DataType`. The data type string format equals
to :class:`DataType.simpleString`, except that top level struct type can omit
the ``struct<>`` and atomic types use ``typeName()`` as their format, e.g. use ``byte`` instead
of ``tinyint`` for :class:`ByteType`. We can also use ``int`` as a short name
for :class:`IntegerType`. Since Spark 2.3, this also supports a schema in a DDL-formatted
string and case-insensitive strings.
>>> _parse_datatype_string("int ")
IntegerType
>>> _parse_datatype_string("INT ")
IntegerType
>>> _parse_datatype_string("a: byte, b: decimal( 16 , 8 ) ")
StructType(List(StructField(a,ByteType,true),StructField(b,DecimalType(16,8),true)))
>>> _parse_datatype_string("a DOUBLE, b STRING")
StructType(List(StructField(a,DoubleType,true),StructField(b,StringType,true)))
>>> _parse_datatype_string("a: array< short>")
StructType(List(StructField(a,ArrayType(ShortType,true),true)))
>>> _parse_datatype_string(" map<string , string > ")
MapType(StringType,StringType,true)
>>> # Error cases
>>> _parse_datatype_string("blabla") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("a: int,") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("array<int") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("map<int, boolean>>") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
"""
sc = SparkContext._active_spark_context
def from_ddl_schema(type_str):
return _parse_datatype_json_string(
sc._jvm.org.apache.spark.sql.types.StructType.fromDDL(type_str).json())
def from_ddl_datatype(type_str):
return _parse_datatype_json_string(
sc._jvm.org.apache.spark.sql.api.python.PythonSQLUtils.parseDataType(type_str).json())
try:
# DDL format, "fieldname datatype, fieldname datatype".
return from_ddl_schema(s)
except Exception as e:
try:
# For backwards compatibility, "integer", "struct<fieldname: datatype>" and etc.
return from_ddl_datatype(s)
except:
try:
# For backwards compatibility, "fieldname: datatype, fieldname: datatype" case.
return from_ddl_datatype("struct<%s>" % s.strip())
except:
raise e
|
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of ``tinyint`` for :class:`ByteType`. We can also use ``int`` as a short name
for :class:`IntegerType`. Since Spark 2.3, this also supports a schema in a DDL-formatted
string and case-insensitive strings.
>>> _parse_datatype_string("int ")
IntegerType
>>> _parse_datatype_string("INT ")
IntegerType
>>> _parse_datatype_string("a: byte, b: decimal( 16 , 8 ) ")
StructType(List(StructField(a,ByteType,true),StructField(b,DecimalType(16,8),true)))
>>> _parse_datatype_string("a DOUBLE, b STRING")
StructType(List(StructField(a,DoubleType,true),StructField(b,StringType,true)))
>>> _parse_datatype_string("a: array< short>")
StructType(List(StructField(a,ArrayType(ShortType,true),true)))
>>> _parse_datatype_string(" map<string , string > ")
MapType(StringType,StringType,true)
>>> # Error cases
>>> _parse_datatype_string("blabla") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("a: int,") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("array<int") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
>>> _parse_datatype_string("map<int, boolean>>") # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ParseException:...
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/types.py#L758-L820
|
train
|
Parses a string into a base - level structure type.
|
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apache/spark
|
python/pyspark/sql/types.py
|
_check_series_convert_timestamps_localize
|
def _check_series_convert_timestamps_localize(s, from_timezone, to_timezone):
"""
Convert timestamp to timezone-naive in the specified timezone or local timezone
:param s: a pandas.Series
:param from_timezone: the timezone to convert from. if None then use local timezone
:param to_timezone: the timezone to convert to. if None then use local timezone
:return pandas.Series where if it is a timestamp, has been converted to tz-naive
"""
from pyspark.sql.utils import require_minimum_pandas_version
require_minimum_pandas_version()
import pandas as pd
from pandas.api.types import is_datetime64tz_dtype, is_datetime64_dtype
from_tz = from_timezone or _get_local_timezone()
to_tz = to_timezone or _get_local_timezone()
# TODO: handle nested timestamps, such as ArrayType(TimestampType())?
if is_datetime64tz_dtype(s.dtype):
return s.dt.tz_convert(to_tz).dt.tz_localize(None)
elif is_datetime64_dtype(s.dtype) and from_tz != to_tz:
# `s.dt.tz_localize('tzlocal()')` doesn't work properly when including NaT.
return s.apply(
lambda ts: ts.tz_localize(from_tz, ambiguous=False).tz_convert(to_tz).tz_localize(None)
if ts is not pd.NaT else pd.NaT)
else:
return s
|
python
|
def _check_series_convert_timestamps_localize(s, from_timezone, to_timezone):
"""
Convert timestamp to timezone-naive in the specified timezone or local timezone
:param s: a pandas.Series
:param from_timezone: the timezone to convert from. if None then use local timezone
:param to_timezone: the timezone to convert to. if None then use local timezone
:return pandas.Series where if it is a timestamp, has been converted to tz-naive
"""
from pyspark.sql.utils import require_minimum_pandas_version
require_minimum_pandas_version()
import pandas as pd
from pandas.api.types import is_datetime64tz_dtype, is_datetime64_dtype
from_tz = from_timezone or _get_local_timezone()
to_tz = to_timezone or _get_local_timezone()
# TODO: handle nested timestamps, such as ArrayType(TimestampType())?
if is_datetime64tz_dtype(s.dtype):
return s.dt.tz_convert(to_tz).dt.tz_localize(None)
elif is_datetime64_dtype(s.dtype) and from_tz != to_tz:
# `s.dt.tz_localize('tzlocal()')` doesn't work properly when including NaT.
return s.apply(
lambda ts: ts.tz_localize(from_tz, ambiguous=False).tz_convert(to_tz).tz_localize(None)
if ts is not pd.NaT else pd.NaT)
else:
return s
|
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Convert timestamp to timezone-naive in the specified timezone or local timezone
:param s: a pandas.Series
:param from_timezone: the timezone to convert from. if None then use local timezone
:param to_timezone: the timezone to convert to. if None then use local timezone
:return pandas.Series where if it is a timestamp, has been converted to tz-naive
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/types.py#L1792-L1817
|
train
|
Convert timestamp to timezone - naive in the specified timezone or local timezone.
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pandas-dev/pandas
|
pandas/io/formats/css.py
|
CSSResolver.parse
|
def parse(self, declarations_str):
"""Generates (prop, value) pairs from declarations
In a future version may generate parsed tokens from tinycss/tinycss2
"""
for decl in declarations_str.split(';'):
if not decl.strip():
continue
prop, sep, val = decl.partition(':')
prop = prop.strip().lower()
# TODO: don't lowercase case sensitive parts of values (strings)
val = val.strip().lower()
if sep:
yield prop, val
else:
warnings.warn('Ill-formatted attribute: expected a colon '
'in {decl!r}'.format(decl=decl), CSSWarning)
|
python
|
def parse(self, declarations_str):
"""Generates (prop, value) pairs from declarations
In a future version may generate parsed tokens from tinycss/tinycss2
"""
for decl in declarations_str.split(';'):
if not decl.strip():
continue
prop, sep, val = decl.partition(':')
prop = prop.strip().lower()
# TODO: don't lowercase case sensitive parts of values (strings)
val = val.strip().lower()
if sep:
yield prop, val
else:
warnings.warn('Ill-formatted attribute: expected a colon '
'in {decl!r}'.format(decl=decl), CSSWarning)
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/io/formats/css.py#L231-L247
|
train
|
Parses a string of CSS attribute names into a list of property value pairs.
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pandas-dev/pandas
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pandas/core/groupby/groupby.py
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GroupBy.rolling
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def rolling(self, *args, **kwargs):
"""
Return a rolling grouper, providing rolling functionality per group.
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from pandas.core.window import RollingGroupby
return RollingGroupby(self, *args, **kwargs)
|
python
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def rolling(self, *args, **kwargs):
"""
Return a rolling grouper, providing rolling functionality per group.
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from pandas.core.window import RollingGroupby
return RollingGroupby(self, *args, **kwargs)
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/groupby/groupby.py#L1457-L1462
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apache/spark
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python/pyspark/heapq3.py
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heapify
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def heapify(x):
"""Transform list into a heap, in-place, in O(len(x)) time."""
n = len(x)
# Transform bottom-up. The largest index there's any point to looking at
# is the largest with a child index in-range, so must have 2*i + 1 < n,
# or i < (n-1)/2. If n is even = 2*j, this is (2*j-1)/2 = j-1/2 so
# j-1 is the largest, which is n//2 - 1. If n is odd = 2*j+1, this is
# (2*j+1-1)/2 = j so j-1 is the largest, and that's again n//2-1.
for i in reversed(range(n//2)):
_siftup(x, i)
|
python
|
def heapify(x):
"""Transform list into a heap, in-place, in O(len(x)) time."""
n = len(x)
# Transform bottom-up. The largest index there's any point to looking at
# is the largest with a child index in-range, so must have 2*i + 1 < n,
# or i < (n-1)/2. If n is even = 2*j, this is (2*j-1)/2 = j-1/2 so
# j-1 is the largest, which is n//2 - 1. If n is odd = 2*j+1, this is
# (2*j+1-1)/2 = j so j-1 is the largest, and that's again n//2-1.
for i in reversed(range(n//2)):
_siftup(x, i)
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/heapq3.py#L449-L458
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train
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apache/spark
|
python/pyspark/traceback_utils.py
|
first_spark_call
|
def first_spark_call():
"""
Return a CallSite representing the first Spark call in the current call stack.
"""
tb = traceback.extract_stack()
if len(tb) == 0:
return None
file, line, module, what = tb[len(tb) - 1]
sparkpath = os.path.dirname(file)
first_spark_frame = len(tb) - 1
for i in range(0, len(tb)):
file, line, fun, what = tb[i]
if file.startswith(sparkpath):
first_spark_frame = i
break
if first_spark_frame == 0:
file, line, fun, what = tb[0]
return CallSite(function=fun, file=file, linenum=line)
sfile, sline, sfun, swhat = tb[first_spark_frame]
ufile, uline, ufun, uwhat = tb[first_spark_frame - 1]
return CallSite(function=sfun, file=ufile, linenum=uline)
|
python
|
def first_spark_call():
"""
Return a CallSite representing the first Spark call in the current call stack.
"""
tb = traceback.extract_stack()
if len(tb) == 0:
return None
file, line, module, what = tb[len(tb) - 1]
sparkpath = os.path.dirname(file)
first_spark_frame = len(tb) - 1
for i in range(0, len(tb)):
file, line, fun, what = tb[i]
if file.startswith(sparkpath):
first_spark_frame = i
break
if first_spark_frame == 0:
file, line, fun, what = tb[0]
return CallSite(function=fun, file=file, linenum=line)
sfile, sline, sfun, swhat = tb[first_spark_frame]
ufile, uline, ufun, uwhat = tb[first_spark_frame - 1]
return CallSite(function=sfun, file=ufile, linenum=uline)
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/traceback_utils.py#L26-L46
|
train
|
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|
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pandas-dev/pandas
|
pandas/core/panel.py
|
panel_index
|
def panel_index(time, panels, names=None):
"""
Returns a multi-index suitable for a panel-like DataFrame.
Parameters
----------
time : array-like
Time index, does not have to repeat
panels : array-like
Panel index, does not have to repeat
names : list, optional
List containing the names of the indices
Returns
-------
multi_index : MultiIndex
Time index is the first level, the panels are the second level.
Examples
--------
>>> years = range(1960,1963)
>>> panels = ['A', 'B', 'C']
>>> panel_idx = panel_index(years, panels)
>>> panel_idx
MultiIndex([(1960, 'A'), (1961, 'A'), (1962, 'A'), (1960, 'B'),
(1961, 'B'), (1962, 'B'), (1960, 'C'), (1961, 'C'),
(1962, 'C')], dtype=object)
or
>>> years = np.repeat(range(1960,1963), 3)
>>> panels = np.tile(['A', 'B', 'C'], 3)
>>> panel_idx = panel_index(years, panels)
>>> panel_idx
MultiIndex([(1960, 'A'), (1960, 'B'), (1960, 'C'), (1961, 'A'),
(1961, 'B'), (1961, 'C'), (1962, 'A'), (1962, 'B'),
(1962, 'C')], dtype=object)
"""
if names is None:
names = ['time', 'panel']
time, panels = _ensure_like_indices(time, panels)
return MultiIndex.from_arrays([time, panels], sortorder=None, names=names)
|
python
|
def panel_index(time, panels, names=None):
"""
Returns a multi-index suitable for a panel-like DataFrame.
Parameters
----------
time : array-like
Time index, does not have to repeat
panels : array-like
Panel index, does not have to repeat
names : list, optional
List containing the names of the indices
Returns
-------
multi_index : MultiIndex
Time index is the first level, the panels are the second level.
Examples
--------
>>> years = range(1960,1963)
>>> panels = ['A', 'B', 'C']
>>> panel_idx = panel_index(years, panels)
>>> panel_idx
MultiIndex([(1960, 'A'), (1961, 'A'), (1962, 'A'), (1960, 'B'),
(1961, 'B'), (1962, 'B'), (1960, 'C'), (1961, 'C'),
(1962, 'C')], dtype=object)
or
>>> years = np.repeat(range(1960,1963), 3)
>>> panels = np.tile(['A', 'B', 'C'], 3)
>>> panel_idx = panel_index(years, panels)
>>> panel_idx
MultiIndex([(1960, 'A'), (1960, 'B'), (1960, 'C'), (1961, 'A'),
(1961, 'B'), (1961, 'C'), (1962, 'A'), (1962, 'B'),
(1962, 'C')], dtype=object)
"""
if names is None:
names = ['time', 'panel']
time, panels = _ensure_like_indices(time, panels)
return MultiIndex.from_arrays([time, panels], sortorder=None, names=names)
|
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Returns a multi-index suitable for a panel-like DataFrame.
Parameters
----------
time : array-like
Time index, does not have to repeat
panels : array-like
Panel index, does not have to repeat
names : list, optional
List containing the names of the indices
Returns
-------
multi_index : MultiIndex
Time index is the first level, the panels are the second level.
Examples
--------
>>> years = range(1960,1963)
>>> panels = ['A', 'B', 'C']
>>> panel_idx = panel_index(years, panels)
>>> panel_idx
MultiIndex([(1960, 'A'), (1961, 'A'), (1962, 'A'), (1960, 'B'),
(1961, 'B'), (1962, 'B'), (1960, 'C'), (1961, 'C'),
(1962, 'C')], dtype=object)
or
>>> years = np.repeat(range(1960,1963), 3)
>>> panels = np.tile(['A', 'B', 'C'], 3)
>>> panel_idx = panel_index(years, panels)
>>> panel_idx
MultiIndex([(1960, 'A'), (1960, 'B'), (1960, 'C'), (1961, 'A'),
(1961, 'B'), (1961, 'C'), (1962, 'A'), (1962, 'B'),
(1962, 'C')], dtype=object)
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/panel.py#L60-L101
|
train
|
Returns a MultiIndex suitable for a panel - like DataFrame.
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apache/spark
|
python/pyspark/sql/column.py
|
Column.substr
|
def substr(self, startPos, length):
"""
Return a :class:`Column` which is a substring of the column.
:param startPos: start position (int or Column)
:param length: length of the substring (int or Column)
>>> df.select(df.name.substr(1, 3).alias("col")).collect()
[Row(col=u'Ali'), Row(col=u'Bob')]
"""
if type(startPos) != type(length):
raise TypeError(
"startPos and length must be the same type. "
"Got {startPos_t} and {length_t}, respectively."
.format(
startPos_t=type(startPos),
length_t=type(length),
))
if isinstance(startPos, int):
jc = self._jc.substr(startPos, length)
elif isinstance(startPos, Column):
jc = self._jc.substr(startPos._jc, length._jc)
else:
raise TypeError("Unexpected type: %s" % type(startPos))
return Column(jc)
|
python
|
def substr(self, startPos, length):
"""
Return a :class:`Column` which is a substring of the column.
:param startPos: start position (int or Column)
:param length: length of the substring (int or Column)
>>> df.select(df.name.substr(1, 3).alias("col")).collect()
[Row(col=u'Ali'), Row(col=u'Bob')]
"""
if type(startPos) != type(length):
raise TypeError(
"startPos and length must be the same type. "
"Got {startPos_t} and {length_t}, respectively."
.format(
startPos_t=type(startPos),
length_t=type(length),
))
if isinstance(startPos, int):
jc = self._jc.substr(startPos, length)
elif isinstance(startPos, Column):
jc = self._jc.substr(startPos._jc, length._jc)
else:
raise TypeError("Unexpected type: %s" % type(startPos))
return Column(jc)
|
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>>> df.select(df.name.substr(1, 3).alias("col")).collect()
[Row(col=u'Ali'), Row(col=u'Bob')]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/column.py#L403-L427
|
train
|
Return a Column which is a substring of the column.
|
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apache/spark
|
python/pyspark/sql/dataframe.py
|
DataFrame.repartition
|
def repartition(self, numPartitions, *cols):
"""
Returns a new :class:`DataFrame` partitioned by the given partitioning expressions. The
resulting DataFrame is hash partitioned.
:param numPartitions:
can be an int to specify the target number of partitions or a Column.
If it is a Column, it will be used as the first partitioning column. If not specified,
the default number of partitions is used.
.. versionchanged:: 1.6
Added optional arguments to specify the partitioning columns. Also made numPartitions
optional if partitioning columns are specified.
>>> df.repartition(10).rdd.getNumPartitions()
10
>>> data = df.union(df).repartition("age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 5| Bob|
| 5| Bob|
| 2|Alice|
| 2|Alice|
+---+-----+
>>> data = data.repartition(7, "age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 2|Alice|
| 5| Bob|
| 2|Alice|
| 5| Bob|
+---+-----+
>>> data.rdd.getNumPartitions()
7
>>> data = data.repartition("name", "age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 5| Bob|
| 5| Bob|
| 2|Alice|
| 2|Alice|
+---+-----+
"""
if isinstance(numPartitions, int):
if len(cols) == 0:
return DataFrame(self._jdf.repartition(numPartitions), self.sql_ctx)
else:
return DataFrame(
self._jdf.repartition(numPartitions, self._jcols(*cols)), self.sql_ctx)
elif isinstance(numPartitions, (basestring, Column)):
cols = (numPartitions, ) + cols
return DataFrame(self._jdf.repartition(self._jcols(*cols)), self.sql_ctx)
else:
raise TypeError("numPartitions should be an int or Column")
|
python
|
def repartition(self, numPartitions, *cols):
"""
Returns a new :class:`DataFrame` partitioned by the given partitioning expressions. The
resulting DataFrame is hash partitioned.
:param numPartitions:
can be an int to specify the target number of partitions or a Column.
If it is a Column, it will be used as the first partitioning column. If not specified,
the default number of partitions is used.
.. versionchanged:: 1.6
Added optional arguments to specify the partitioning columns. Also made numPartitions
optional if partitioning columns are specified.
>>> df.repartition(10).rdd.getNumPartitions()
10
>>> data = df.union(df).repartition("age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 5| Bob|
| 5| Bob|
| 2|Alice|
| 2|Alice|
+---+-----+
>>> data = data.repartition(7, "age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 2|Alice|
| 5| Bob|
| 2|Alice|
| 5| Bob|
+---+-----+
>>> data.rdd.getNumPartitions()
7
>>> data = data.repartition("name", "age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 5| Bob|
| 5| Bob|
| 2|Alice|
| 2|Alice|
+---+-----+
"""
if isinstance(numPartitions, int):
if len(cols) == 0:
return DataFrame(self._jdf.repartition(numPartitions), self.sql_ctx)
else:
return DataFrame(
self._jdf.repartition(numPartitions, self._jcols(*cols)), self.sql_ctx)
elif isinstance(numPartitions, (basestring, Column)):
cols = (numPartitions, ) + cols
return DataFrame(self._jdf.repartition(self._jcols(*cols)), self.sql_ctx)
else:
raise TypeError("numPartitions should be an int or Column")
|
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:param numPartitions:
can be an int to specify the target number of partitions or a Column.
If it is a Column, it will be used as the first partitioning column. If not specified,
the default number of partitions is used.
.. versionchanged:: 1.6
Added optional arguments to specify the partitioning columns. Also made numPartitions
optional if partitioning columns are specified.
>>> df.repartition(10).rdd.getNumPartitions()
10
>>> data = df.union(df).repartition("age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 5| Bob|
| 5| Bob|
| 2|Alice|
| 2|Alice|
+---+-----+
>>> data = data.repartition(7, "age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 2|Alice|
| 5| Bob|
| 2|Alice|
| 5| Bob|
+---+-----+
>>> data.rdd.getNumPartitions()
7
>>> data = data.repartition("name", "age")
>>> data.show()
+---+-----+
|age| name|
+---+-----+
| 5| Bob|
| 5| Bob|
| 2|Alice|
| 2|Alice|
+---+-----+
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/dataframe.py#L662-L721
|
train
|
Returns a new DataFrame with the given number of partitions and the given columns.
|
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pytorch_pretrained_bert/tokenization.py
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whitespace_tokenize
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def whitespace_tokenize(text):
"""Runs basic whitespace cleaning and splitting on a piece of text."""
text = text.strip()
if not text:
return []
tokens = text.split()
return tokens
|
python
|
def whitespace_tokenize(text):
"""Runs basic whitespace cleaning and splitting on a piece of text."""
text = text.strip()
if not text:
return []
tokens = text.split()
return tokens
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b832d5bb8a6dfc5965015b828e577677eace601e
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https://github.com/huggingface/pytorch-pretrained-BERT/blob/b832d5bb8a6dfc5965015b828e577677eace601e/pytorch_pretrained_bert/tokenization.py#L65-L71
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train
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|
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pandas-dev/pandas
|
pandas/core/groupby/grouper.py
|
_get_grouper
|
def _get_grouper(obj, key=None, axis=0, level=None, sort=True,
observed=False, mutated=False, validate=True):
"""
create and return a BaseGrouper, which is an internal
mapping of how to create the grouper indexers.
This may be composed of multiple Grouping objects, indicating
multiple groupers
Groupers are ultimately index mappings. They can originate as:
index mappings, keys to columns, functions, or Groupers
Groupers enable local references to axis,level,sort, while
the passed in axis, level, and sort are 'global'.
This routine tries to figure out what the passing in references
are and then creates a Grouping for each one, combined into
a BaseGrouper.
If observed & we have a categorical grouper, only show the observed
values
If validate, then check for key/level overlaps
"""
group_axis = obj._get_axis(axis)
# validate that the passed single level is compatible with the passed
# axis of the object
if level is not None:
# TODO: These if-block and else-block are almost same.
# MultiIndex instance check is removable, but it seems that there are
# some processes only for non-MultiIndex in else-block,
# eg. `obj.index.name != level`. We have to consider carefully whether
# these are applicable for MultiIndex. Even if these are applicable,
# we need to check if it makes no side effect to subsequent processes
# on the outside of this condition.
# (GH 17621)
if isinstance(group_axis, MultiIndex):
if is_list_like(level) and len(level) == 1:
level = level[0]
if key is None and is_scalar(level):
# Get the level values from group_axis
key = group_axis.get_level_values(level)
level = None
else:
# allow level to be a length-one list-like object
# (e.g., level=[0])
# GH 13901
if is_list_like(level):
nlevels = len(level)
if nlevels == 1:
level = level[0]
elif nlevels == 0:
raise ValueError('No group keys passed!')
else:
raise ValueError('multiple levels only valid with '
'MultiIndex')
if isinstance(level, str):
if obj.index.name != level:
raise ValueError('level name {} is not the name of the '
'index'.format(level))
elif level > 0 or level < -1:
raise ValueError(
'level > 0 or level < -1 only valid with MultiIndex')
# NOTE: `group_axis` and `group_axis.get_level_values(level)`
# are same in this section.
level = None
key = group_axis
# a passed-in Grouper, directly convert
if isinstance(key, Grouper):
binner, grouper, obj = key._get_grouper(obj, validate=False)
if key.key is None:
return grouper, [], obj
else:
return grouper, {key.key}, obj
# already have a BaseGrouper, just return it
elif isinstance(key, BaseGrouper):
return key, [], obj
# In the future, a tuple key will always mean an actual key,
# not an iterable of keys. In the meantime, we attempt to provide
# a warning. We can assume that the user wanted a list of keys when
# the key is not in the index. We just have to be careful with
# unhashble elements of `key`. Any unhashable elements implies that
# they wanted a list of keys.
# https://github.com/pandas-dev/pandas/issues/18314
is_tuple = isinstance(key, tuple)
all_hashable = is_tuple and is_hashable(key)
if is_tuple:
if ((all_hashable and key not in obj and set(key).issubset(obj))
or not all_hashable):
# column names ('a', 'b') -> ['a', 'b']
# arrays like (a, b) -> [a, b]
msg = ("Interpreting tuple 'by' as a list of keys, rather than "
"a single key. Use 'by=[...]' instead of 'by=(...)'. In "
"the future, a tuple will always mean a single key.")
warnings.warn(msg, FutureWarning, stacklevel=5)
key = list(key)
if not isinstance(key, list):
keys = [key]
match_axis_length = False
else:
keys = key
match_axis_length = len(keys) == len(group_axis)
# what are we after, exactly?
any_callable = any(callable(g) or isinstance(g, dict) for g in keys)
any_groupers = any(isinstance(g, Grouper) for g in keys)
any_arraylike = any(isinstance(g, (list, tuple, Series, Index, np.ndarray))
for g in keys)
# is this an index replacement?
if (not any_callable and not any_arraylike and not any_groupers and
match_axis_length and level is None):
if isinstance(obj, DataFrame):
all_in_columns_index = all(g in obj.columns or g in
obj.index.names for g in keys)
elif isinstance(obj, Series):
all_in_columns_index = all(g in obj.index.names for g in keys)
if not all_in_columns_index:
keys = [com.asarray_tuplesafe(keys)]
if isinstance(level, (tuple, list)):
if key is None:
keys = [None] * len(level)
levels = level
else:
levels = [level] * len(keys)
groupings = []
exclusions = []
# if the actual grouper should be obj[key]
def is_in_axis(key):
if not _is_label_like(key):
try:
obj._data.items.get_loc(key)
except Exception:
return False
return True
# if the grouper is obj[name]
def is_in_obj(gpr):
try:
return id(gpr) == id(obj[gpr.name])
except Exception:
return False
for i, (gpr, level) in enumerate(zip(keys, levels)):
if is_in_obj(gpr): # df.groupby(df['name'])
in_axis, name = True, gpr.name
exclusions.append(name)
elif is_in_axis(gpr): # df.groupby('name')
if gpr in obj:
if validate:
obj._check_label_or_level_ambiguity(gpr)
in_axis, name, gpr = True, gpr, obj[gpr]
exclusions.append(name)
elif obj._is_level_reference(gpr):
in_axis, name, level, gpr = False, None, gpr, None
else:
raise KeyError(gpr)
elif isinstance(gpr, Grouper) and gpr.key is not None:
# Add key to exclusions
exclusions.append(gpr.key)
in_axis, name = False, None
else:
in_axis, name = False, None
if is_categorical_dtype(gpr) and len(gpr) != obj.shape[axis]:
raise ValueError(
("Length of grouper ({len_gpr}) and axis ({len_axis})"
" must be same length"
.format(len_gpr=len(gpr), len_axis=obj.shape[axis])))
# create the Grouping
# allow us to passing the actual Grouping as the gpr
ping = (Grouping(group_axis,
gpr,
obj=obj,
name=name,
level=level,
sort=sort,
observed=observed,
in_axis=in_axis)
if not isinstance(gpr, Grouping) else gpr)
groupings.append(ping)
if len(groupings) == 0:
raise ValueError('No group keys passed!')
# create the internals grouper
grouper = BaseGrouper(group_axis, groupings, sort=sort, mutated=mutated)
return grouper, exclusions, obj
|
python
|
def _get_grouper(obj, key=None, axis=0, level=None, sort=True,
observed=False, mutated=False, validate=True):
"""
create and return a BaseGrouper, which is an internal
mapping of how to create the grouper indexers.
This may be composed of multiple Grouping objects, indicating
multiple groupers
Groupers are ultimately index mappings. They can originate as:
index mappings, keys to columns, functions, or Groupers
Groupers enable local references to axis,level,sort, while
the passed in axis, level, and sort are 'global'.
This routine tries to figure out what the passing in references
are and then creates a Grouping for each one, combined into
a BaseGrouper.
If observed & we have a categorical grouper, only show the observed
values
If validate, then check for key/level overlaps
"""
group_axis = obj._get_axis(axis)
# validate that the passed single level is compatible with the passed
# axis of the object
if level is not None:
# TODO: These if-block and else-block are almost same.
# MultiIndex instance check is removable, but it seems that there are
# some processes only for non-MultiIndex in else-block,
# eg. `obj.index.name != level`. We have to consider carefully whether
# these are applicable for MultiIndex. Even if these are applicable,
# we need to check if it makes no side effect to subsequent processes
# on the outside of this condition.
# (GH 17621)
if isinstance(group_axis, MultiIndex):
if is_list_like(level) and len(level) == 1:
level = level[0]
if key is None and is_scalar(level):
# Get the level values from group_axis
key = group_axis.get_level_values(level)
level = None
else:
# allow level to be a length-one list-like object
# (e.g., level=[0])
# GH 13901
if is_list_like(level):
nlevels = len(level)
if nlevels == 1:
level = level[0]
elif nlevels == 0:
raise ValueError('No group keys passed!')
else:
raise ValueError('multiple levels only valid with '
'MultiIndex')
if isinstance(level, str):
if obj.index.name != level:
raise ValueError('level name {} is not the name of the '
'index'.format(level))
elif level > 0 or level < -1:
raise ValueError(
'level > 0 or level < -1 only valid with MultiIndex')
# NOTE: `group_axis` and `group_axis.get_level_values(level)`
# are same in this section.
level = None
key = group_axis
# a passed-in Grouper, directly convert
if isinstance(key, Grouper):
binner, grouper, obj = key._get_grouper(obj, validate=False)
if key.key is None:
return grouper, [], obj
else:
return grouper, {key.key}, obj
# already have a BaseGrouper, just return it
elif isinstance(key, BaseGrouper):
return key, [], obj
# In the future, a tuple key will always mean an actual key,
# not an iterable of keys. In the meantime, we attempt to provide
# a warning. We can assume that the user wanted a list of keys when
# the key is not in the index. We just have to be careful with
# unhashble elements of `key`. Any unhashable elements implies that
# they wanted a list of keys.
# https://github.com/pandas-dev/pandas/issues/18314
is_tuple = isinstance(key, tuple)
all_hashable = is_tuple and is_hashable(key)
if is_tuple:
if ((all_hashable and key not in obj and set(key).issubset(obj))
or not all_hashable):
# column names ('a', 'b') -> ['a', 'b']
# arrays like (a, b) -> [a, b]
msg = ("Interpreting tuple 'by' as a list of keys, rather than "
"a single key. Use 'by=[...]' instead of 'by=(...)'. In "
"the future, a tuple will always mean a single key.")
warnings.warn(msg, FutureWarning, stacklevel=5)
key = list(key)
if not isinstance(key, list):
keys = [key]
match_axis_length = False
else:
keys = key
match_axis_length = len(keys) == len(group_axis)
# what are we after, exactly?
any_callable = any(callable(g) or isinstance(g, dict) for g in keys)
any_groupers = any(isinstance(g, Grouper) for g in keys)
any_arraylike = any(isinstance(g, (list, tuple, Series, Index, np.ndarray))
for g in keys)
# is this an index replacement?
if (not any_callable and not any_arraylike and not any_groupers and
match_axis_length and level is None):
if isinstance(obj, DataFrame):
all_in_columns_index = all(g in obj.columns or g in
obj.index.names for g in keys)
elif isinstance(obj, Series):
all_in_columns_index = all(g in obj.index.names for g in keys)
if not all_in_columns_index:
keys = [com.asarray_tuplesafe(keys)]
if isinstance(level, (tuple, list)):
if key is None:
keys = [None] * len(level)
levels = level
else:
levels = [level] * len(keys)
groupings = []
exclusions = []
# if the actual grouper should be obj[key]
def is_in_axis(key):
if not _is_label_like(key):
try:
obj._data.items.get_loc(key)
except Exception:
return False
return True
# if the grouper is obj[name]
def is_in_obj(gpr):
try:
return id(gpr) == id(obj[gpr.name])
except Exception:
return False
for i, (gpr, level) in enumerate(zip(keys, levels)):
if is_in_obj(gpr): # df.groupby(df['name'])
in_axis, name = True, gpr.name
exclusions.append(name)
elif is_in_axis(gpr): # df.groupby('name')
if gpr in obj:
if validate:
obj._check_label_or_level_ambiguity(gpr)
in_axis, name, gpr = True, gpr, obj[gpr]
exclusions.append(name)
elif obj._is_level_reference(gpr):
in_axis, name, level, gpr = False, None, gpr, None
else:
raise KeyError(gpr)
elif isinstance(gpr, Grouper) and gpr.key is not None:
# Add key to exclusions
exclusions.append(gpr.key)
in_axis, name = False, None
else:
in_axis, name = False, None
if is_categorical_dtype(gpr) and len(gpr) != obj.shape[axis]:
raise ValueError(
("Length of grouper ({len_gpr}) and axis ({len_axis})"
" must be same length"
.format(len_gpr=len(gpr), len_axis=obj.shape[axis])))
# create the Grouping
# allow us to passing the actual Grouping as the gpr
ping = (Grouping(group_axis,
gpr,
obj=obj,
name=name,
level=level,
sort=sort,
observed=observed,
in_axis=in_axis)
if not isinstance(gpr, Grouping) else gpr)
groupings.append(ping)
if len(groupings) == 0:
raise ValueError('No group keys passed!')
# create the internals grouper
grouper = BaseGrouper(group_axis, groupings, sort=sort, mutated=mutated)
return grouper, exclusions, obj
|
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create and return a BaseGrouper, which is an internal
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Groupers are ultimately index mappings. They can originate as:
index mappings, keys to columns, functions, or Groupers
Groupers enable local references to axis,level,sort, while
the passed in axis, level, and sort are 'global'.
This routine tries to figure out what the passing in references
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If observed & we have a categorical grouper, only show the observed
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/groupby/grouper.py#L406-L612
|
train
|
Internal helper function to create a Grouper for a given object.
|
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pandas-dev/pandas
|
pandas/core/groupby/ops.py
|
BinGrouper.get_iterator
|
def get_iterator(self, data, axis=0):
"""
Groupby iterator
Returns
-------
Generator yielding sequence of (name, subsetted object)
for each group
"""
if isinstance(data, NDFrame):
slicer = lambda start, edge: data._slice(
slice(start, edge), axis=axis)
length = len(data.axes[axis])
else:
slicer = lambda start, edge: data[slice(start, edge)]
length = len(data)
start = 0
for edge, label in zip(self.bins, self.binlabels):
if label is not NaT:
yield label, slicer(start, edge)
start = edge
if start < length:
yield self.binlabels[-1], slicer(start, None)
|
python
|
def get_iterator(self, data, axis=0):
"""
Groupby iterator
Returns
-------
Generator yielding sequence of (name, subsetted object)
for each group
"""
if isinstance(data, NDFrame):
slicer = lambda start, edge: data._slice(
slice(start, edge), axis=axis)
length = len(data.axes[axis])
else:
slicer = lambda start, edge: data[slice(start, edge)]
length = len(data)
start = 0
for edge, label in zip(self.bins, self.binlabels):
if label is not NaT:
yield label, slicer(start, edge)
start = edge
if start < length:
yield self.binlabels[-1], slicer(start, None)
|
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[
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/groupby/ops.py#L711-L735
|
train
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Returns an iterator over the set of items in the specified axis.
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pandas-dev/pandas
|
pandas/core/missing.py
|
_akima_interpolate
|
def _akima_interpolate(xi, yi, x, der=0, axis=0):
"""
Convenience function for akima interpolation.
xi and yi are arrays of values used to approximate some function f,
with ``yi = f(xi)``.
See `Akima1DInterpolator` for details.
Parameters
----------
xi : array_like
A sorted list of x-coordinates, of length N.
yi : array_like
A 1-D array of real values. `yi`'s length along the interpolation
axis must be equal to the length of `xi`. If N-D array, use axis
parameter to select correct axis.
x : scalar or array_like
Of length M.
der : int or list, optional
How many derivatives to extract; None for all potentially
nonzero derivatives (that is a number equal to the number
of points), or a list of derivatives to extract. This number
includes the function value as 0th derivative.
axis : int, optional
Axis in the yi array corresponding to the x-coordinate values.
See Also
--------
scipy.interpolate.Akima1DInterpolator
Returns
-------
y : scalar or array_like
The result, of length R or length M or M by R,
"""
from scipy import interpolate
try:
P = interpolate.Akima1DInterpolator(xi, yi, axis=axis)
except TypeError:
# Scipy earlier than 0.17.0 missing axis
P = interpolate.Akima1DInterpolator(xi, yi)
if der == 0:
return P(x)
elif interpolate._isscalar(der):
return P(x, der=der)
else:
return [P(x, nu) for nu in der]
|
python
|
def _akima_interpolate(xi, yi, x, der=0, axis=0):
"""
Convenience function for akima interpolation.
xi and yi are arrays of values used to approximate some function f,
with ``yi = f(xi)``.
See `Akima1DInterpolator` for details.
Parameters
----------
xi : array_like
A sorted list of x-coordinates, of length N.
yi : array_like
A 1-D array of real values. `yi`'s length along the interpolation
axis must be equal to the length of `xi`. If N-D array, use axis
parameter to select correct axis.
x : scalar or array_like
Of length M.
der : int or list, optional
How many derivatives to extract; None for all potentially
nonzero derivatives (that is a number equal to the number
of points), or a list of derivatives to extract. This number
includes the function value as 0th derivative.
axis : int, optional
Axis in the yi array corresponding to the x-coordinate values.
See Also
--------
scipy.interpolate.Akima1DInterpolator
Returns
-------
y : scalar or array_like
The result, of length R or length M or M by R,
"""
from scipy import interpolate
try:
P = interpolate.Akima1DInterpolator(xi, yi, axis=axis)
except TypeError:
# Scipy earlier than 0.17.0 missing axis
P = interpolate.Akima1DInterpolator(xi, yi)
if der == 0:
return P(x)
elif interpolate._isscalar(der):
return P(x, der=der)
else:
return [P(x, nu) for nu in der]
|
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See `Akima1DInterpolator` for details.
Parameters
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xi : array_like
A sorted list of x-coordinates, of length N.
yi : array_like
A 1-D array of real values. `yi`'s length along the interpolation
axis must be equal to the length of `xi`. If N-D array, use axis
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x : scalar or array_like
Of length M.
der : int or list, optional
How many derivatives to extract; None for all potentially
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includes the function value as 0th derivative.
axis : int, optional
Axis in the yi array corresponding to the x-coordinate values.
See Also
--------
scipy.interpolate.Akima1DInterpolator
Returns
-------
y : scalar or array_like
The result, of length R or length M or M by R,
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/missing.py#L358-L405
|
train
|
A helper function for interpolation of a set of real values.
|
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apache/spark
|
python/pyspark/sql/functions.py
|
ntile
|
def ntile(n):
"""
Window function: returns the ntile group id (from 1 to `n` inclusive)
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quarter of the rows will get value 1, the second quarter will get 2,
the third quarter will get 3, and the last quarter will get 4.
This is equivalent to the NTILE function in SQL.
:param n: an integer
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.ntile(int(n)))
|
python
|
def ntile(n):
"""
Window function: returns the ntile group id (from 1 to `n` inclusive)
in an ordered window partition. For example, if `n` is 4, the first
quarter of the rows will get value 1, the second quarter will get 2,
the third quarter will get 3, and the last quarter will get 4.
This is equivalent to the NTILE function in SQL.
:param n: an integer
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.ntile(int(n)))
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L872-L884
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train
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This function returns the n - th ntile group id in an ordered window partition.
|
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pandas-dev/pandas
|
pandas/core/dtypes/inference.py
|
is_dict_like
|
def is_dict_like(obj):
"""
Check if the object is dict-like.
Parameters
----------
obj : The object to check
Returns
-------
is_dict_like : bool
Whether `obj` has dict-like properties.
Examples
--------
>>> is_dict_like({1: 2})
True
>>> is_dict_like([1, 2, 3])
False
>>> is_dict_like(dict)
False
>>> is_dict_like(dict())
True
"""
dict_like_attrs = ("__getitem__", "keys", "__contains__")
return (all(hasattr(obj, attr) for attr in dict_like_attrs)
# [GH 25196] exclude classes
and not isinstance(obj, type))
|
python
|
def is_dict_like(obj):
"""
Check if the object is dict-like.
Parameters
----------
obj : The object to check
Returns
-------
is_dict_like : bool
Whether `obj` has dict-like properties.
Examples
--------
>>> is_dict_like({1: 2})
True
>>> is_dict_like([1, 2, 3])
False
>>> is_dict_like(dict)
False
>>> is_dict_like(dict())
True
"""
dict_like_attrs = ("__getitem__", "keys", "__contains__")
return (all(hasattr(obj, attr) for attr in dict_like_attrs)
# [GH 25196] exclude classes
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|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/dtypes/inference.py#L373-L400
|
train
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Checks if the object is dict - like.
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apache/spark
|
python/pyspark/sql/functions.py
|
locate
|
def locate(substr, str, pos=1):
"""
Locate the position of the first occurrence of substr in a string column, after position pos.
.. note:: The position is not zero based, but 1 based index. Returns 0 if substr
could not be found in str.
:param substr: a string
:param str: a Column of :class:`pyspark.sql.types.StringType`
:param pos: start position (zero based)
>>> df = spark.createDataFrame([('abcd',)], ['s',])
>>> df.select(locate('b', df.s, 1).alias('s')).collect()
[Row(s=2)]
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.locate(substr, _to_java_column(str), pos))
|
python
|
def locate(substr, str, pos=1):
"""
Locate the position of the first occurrence of substr in a string column, after position pos.
.. note:: The position is not zero based, but 1 based index. Returns 0 if substr
could not be found in str.
:param substr: a string
:param str: a Column of :class:`pyspark.sql.types.StringType`
:param pos: start position (zero based)
>>> df = spark.createDataFrame([('abcd',)], ['s',])
>>> df.select(locate('b', df.s, 1).alias('s')).collect()
[Row(s=2)]
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.locate(substr, _to_java_column(str), pos))
|
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Locate the position of the first occurrence of substr in a string column, after position pos.
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:param substr: a string
:param str: a Column of :class:`pyspark.sql.types.StringType`
:param pos: start position (zero based)
>>> df = spark.createDataFrame([('abcd',)], ['s',])
>>> df.select(locate('b', df.s, 1).alias('s')).collect()
[Row(s=2)]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L1647-L1663
|
train
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Locate the first occurrence of substr in a string column after position pos. Returns 0 if substr could not be found in str.
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apache/spark
|
python/pyspark/rdd.py
|
RDD.takeSample
|
def takeSample(self, withReplacement, num, seed=None):
"""
Return a fixed-size sampled subset of this RDD.
.. note:: This method should only be used if the resulting array is expected
to be small, as all the data is loaded into the driver's memory.
>>> rdd = sc.parallelize(range(0, 10))
>>> len(rdd.takeSample(True, 20, 1))
20
>>> len(rdd.takeSample(False, 5, 2))
5
>>> len(rdd.takeSample(False, 15, 3))
10
"""
numStDev = 10.0
if num < 0:
raise ValueError("Sample size cannot be negative.")
elif num == 0:
return []
initialCount = self.count()
if initialCount == 0:
return []
rand = random.Random(seed)
if (not withReplacement) and num >= initialCount:
# shuffle current RDD and return
samples = self.collect()
rand.shuffle(samples)
return samples
maxSampleSize = sys.maxsize - int(numStDev * sqrt(sys.maxsize))
if num > maxSampleSize:
raise ValueError(
"Sample size cannot be greater than %d." % maxSampleSize)
fraction = RDD._computeFractionForSampleSize(
num, initialCount, withReplacement)
samples = self.sample(withReplacement, fraction, seed).collect()
# If the first sample didn't turn out large enough, keep trying to take samples;
# this shouldn't happen often because we use a big multiplier for their initial size.
# See: scala/spark/RDD.scala
while len(samples) < num:
# TODO: add log warning for when more than one iteration was run
seed = rand.randint(0, sys.maxsize)
samples = self.sample(withReplacement, fraction, seed).collect()
rand.shuffle(samples)
return samples[0:num]
|
python
|
def takeSample(self, withReplacement, num, seed=None):
"""
Return a fixed-size sampled subset of this RDD.
.. note:: This method should only be used if the resulting array is expected
to be small, as all the data is loaded into the driver's memory.
>>> rdd = sc.parallelize(range(0, 10))
>>> len(rdd.takeSample(True, 20, 1))
20
>>> len(rdd.takeSample(False, 5, 2))
5
>>> len(rdd.takeSample(False, 15, 3))
10
"""
numStDev = 10.0
if num < 0:
raise ValueError("Sample size cannot be negative.")
elif num == 0:
return []
initialCount = self.count()
if initialCount == 0:
return []
rand = random.Random(seed)
if (not withReplacement) and num >= initialCount:
# shuffle current RDD and return
samples = self.collect()
rand.shuffle(samples)
return samples
maxSampleSize = sys.maxsize - int(numStDev * sqrt(sys.maxsize))
if num > maxSampleSize:
raise ValueError(
"Sample size cannot be greater than %d." % maxSampleSize)
fraction = RDD._computeFractionForSampleSize(
num, initialCount, withReplacement)
samples = self.sample(withReplacement, fraction, seed).collect()
# If the first sample didn't turn out large enough, keep trying to take samples;
# this shouldn't happen often because we use a big multiplier for their initial size.
# See: scala/spark/RDD.scala
while len(samples) < num:
# TODO: add log warning for when more than one iteration was run
seed = rand.randint(0, sys.maxsize)
samples = self.sample(withReplacement, fraction, seed).collect()
rand.shuffle(samples)
return samples[0:num]
|
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>>> rdd = sc.parallelize(range(0, 10))
>>> len(rdd.takeSample(True, 20, 1))
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>>> len(rdd.takeSample(False, 5, 2))
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>>> len(rdd.takeSample(False, 15, 3))
10
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L465-L518
|
train
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Return a fixed - size sampled subset of this RDD.
|
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apache/spark
|
python/pyspark/context.py
|
SparkContext.setSystemProperty
|
def setSystemProperty(cls, key, value):
"""
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SparkContext._ensure_initialized()
SparkContext._jvm.java.lang.System.setProperty(key, value)
|
python
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def setSystemProperty(cls, key, value):
"""
Set a Java system property, such as spark.executor.memory. This must
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/context.py#L372-L378
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train
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python/pyspark/ml/param/__init__.py
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Params.copy
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def copy(self, extra=None):
"""
Creates a copy of this instance with the same uid and some
extra params. The default implementation creates a
shallow copy using :py:func:`copy.copy`, and then copies the
embedded and extra parameters over and returns the copy.
Subclasses should override this method if the default approach
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:param extra: Extra parameters to copy to the new instance
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if extra is None:
extra = dict()
that = copy.copy(self)
that._paramMap = {}
that._defaultParamMap = {}
return self._copyValues(that, extra)
|
python
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def copy(self, extra=None):
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Creates a copy of this instance with the same uid and some
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Subclasses should override this method if the default approach
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:param extra: Extra parameters to copy to the new instance
:return: Copy of this instance
"""
if extra is None:
extra = dict()
that = copy.copy(self)
that._paramMap = {}
that._defaultParamMap = {}
return self._copyValues(that, extra)
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/ml/param/__init__.py#L368-L385
|
train
|
Creates a shallow copy of this instance with the same uid and extra params.
|
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apache/spark
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python/pyspark/taskcontext.py
|
BarrierTaskContext.getTaskInfos
|
def getTaskInfos(self):
"""
.. note:: Experimental
Returns :class:`BarrierTaskInfo` for all tasks in this barrier stage,
ordered by partition ID.
.. versionadded:: 2.4.0
"""
if self._port is None or self._secret is None:
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else:
addresses = self._localProperties.get("addresses", "")
return [BarrierTaskInfo(h.strip()) for h in addresses.split(",")]
|
python
|
def getTaskInfos(self):
"""
.. note:: Experimental
Returns :class:`BarrierTaskInfo` for all tasks in this barrier stage,
ordered by partition ID.
.. versionadded:: 2.4.0
"""
if self._port is None or self._secret is None:
raise Exception("Not supported to call getTaskInfos() before initialize " +
"BarrierTaskContext.")
else:
addresses = self._localProperties.get("addresses", "")
return [BarrierTaskInfo(h.strip()) for h in addresses.split(",")]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/taskcontext.py#L191-L205
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train
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|
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apache/spark
|
python/pyspark/shuffle.py
|
ExternalMerger.mergeValues
|
def mergeValues(self, iterator):
""" Combine the items by creator and combiner """
# speedup attribute lookup
creator, comb = self.agg.createCombiner, self.agg.mergeValue
c, data, pdata, hfun, batch = 0, self.data, self.pdata, self._partition, self.batch
limit = self.memory_limit
for k, v in iterator:
d = pdata[hfun(k)] if pdata else data
d[k] = comb(d[k], v) if k in d else creator(v)
c += 1
if c >= batch:
if get_used_memory() >= limit:
self._spill()
limit = self._next_limit()
batch /= 2
c = 0
else:
batch *= 1.5
if get_used_memory() >= limit:
self._spill()
|
python
|
def mergeValues(self, iterator):
""" Combine the items by creator and combiner """
# speedup attribute lookup
creator, comb = self.agg.createCombiner, self.agg.mergeValue
c, data, pdata, hfun, batch = 0, self.data, self.pdata, self._partition, self.batch
limit = self.memory_limit
for k, v in iterator:
d = pdata[hfun(k)] if pdata else data
d[k] = comb(d[k], v) if k in d else creator(v)
c += 1
if c >= batch:
if get_used_memory() >= limit:
self._spill()
limit = self._next_limit()
batch /= 2
c = 0
else:
batch *= 1.5
if get_used_memory() >= limit:
self._spill()
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/shuffle.py#L231-L253
|
train
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Combine the items by creator and combiner
|
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apache/spark
|
python/pyspark/find_spark_home.py
|
_find_spark_home
|
def _find_spark_home():
"""Find the SPARK_HOME."""
# If the environment has SPARK_HOME set trust it.
if "SPARK_HOME" in os.environ:
return os.environ["SPARK_HOME"]
def is_spark_home(path):
"""Takes a path and returns true if the provided path could be a reasonable SPARK_HOME"""
return (os.path.isfile(os.path.join(path, "bin/spark-submit")) and
(os.path.isdir(os.path.join(path, "jars")) or
os.path.isdir(os.path.join(path, "assembly"))))
paths = ["../", os.path.dirname(os.path.realpath(__file__))]
# Add the path of the PySpark module if it exists
if sys.version < "3":
import imp
try:
module_home = imp.find_module("pyspark")[1]
paths.append(module_home)
# If we are installed in edit mode also look two dirs up
paths.append(os.path.join(module_home, "../../"))
except ImportError:
# Not pip installed no worries
pass
else:
from importlib.util import find_spec
try:
module_home = os.path.dirname(find_spec("pyspark").origin)
paths.append(module_home)
# If we are installed in edit mode also look two dirs up
paths.append(os.path.join(module_home, "../../"))
except ImportError:
# Not pip installed no worries
pass
# Normalize the paths
paths = [os.path.abspath(p) for p in paths]
try:
return next(path for path in paths if is_spark_home(path))
except StopIteration:
print("Could not find valid SPARK_HOME while searching {0}".format(paths), file=sys.stderr)
sys.exit(-1)
|
python
|
def _find_spark_home():
"""Find the SPARK_HOME."""
# If the environment has SPARK_HOME set trust it.
if "SPARK_HOME" in os.environ:
return os.environ["SPARK_HOME"]
def is_spark_home(path):
"""Takes a path and returns true if the provided path could be a reasonable SPARK_HOME"""
return (os.path.isfile(os.path.join(path, "bin/spark-submit")) and
(os.path.isdir(os.path.join(path, "jars")) or
os.path.isdir(os.path.join(path, "assembly"))))
paths = ["../", os.path.dirname(os.path.realpath(__file__))]
# Add the path of the PySpark module if it exists
if sys.version < "3":
import imp
try:
module_home = imp.find_module("pyspark")[1]
paths.append(module_home)
# If we are installed in edit mode also look two dirs up
paths.append(os.path.join(module_home, "../../"))
except ImportError:
# Not pip installed no worries
pass
else:
from importlib.util import find_spec
try:
module_home = os.path.dirname(find_spec("pyspark").origin)
paths.append(module_home)
# If we are installed in edit mode also look two dirs up
paths.append(os.path.join(module_home, "../../"))
except ImportError:
# Not pip installed no worries
pass
# Normalize the paths
paths = [os.path.abspath(p) for p in paths]
try:
return next(path for path in paths if is_spark_home(path))
except StopIteration:
print("Could not find valid SPARK_HOME while searching {0}".format(paths), file=sys.stderr)
sys.exit(-1)
|
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Find the SPARK_HOME.
|
[
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/find_spark_home.py#L28-L71
|
train
|
Find the SPARK_HOME.
|
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apache/spark
|
python/pyspark/ml/param/__init__.py
|
Params.extractParamMap
|
def extractParamMap(self, extra=None):
"""
Extracts the embedded default param values and user-supplied
values, and then merges them with extra values from input into
a flat param map, where the latter value is used if there exist
conflicts, i.e., with ordering: default param values <
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:param extra: extra param values
:return: merged param map
"""
if extra is None:
extra = dict()
paramMap = self._defaultParamMap.copy()
paramMap.update(self._paramMap)
paramMap.update(extra)
return paramMap
|
python
|
def extractParamMap(self, extra=None):
"""
Extracts the embedded default param values and user-supplied
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conflicts, i.e., with ordering: default param values <
user-supplied values < extra.
:param extra: extra param values
:return: merged param map
"""
if extra is None:
extra = dict()
paramMap = self._defaultParamMap.copy()
paramMap.update(self._paramMap)
paramMap.update(extra)
return paramMap
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/ml/param/__init__.py#L350-L366
|
train
|
Extracts the embedded default param values and user - supplied param values and merges them with extra values into the param map.
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pandas-dev/pandas
|
pandas/core/indexes/base.py
|
Index._try_convert_to_int_index
|
def _try_convert_to_int_index(cls, data, copy, name, dtype):
"""
Attempt to convert an array of data into an integer index.
Parameters
----------
data : The data to convert.
copy : Whether to copy the data or not.
name : The name of the index returned.
Returns
-------
int_index : data converted to either an Int64Index or a
UInt64Index
Raises
------
ValueError if the conversion was not successful.
"""
from .numeric import Int64Index, UInt64Index
if not is_unsigned_integer_dtype(dtype):
# skip int64 conversion attempt if uint-like dtype is passed, as
# this could return Int64Index when UInt64Index is what's desrired
try:
res = data.astype('i8', copy=False)
if (res == data).all():
return Int64Index(res, copy=copy, name=name)
except (OverflowError, TypeError, ValueError):
pass
# Conversion to int64 failed (possibly due to overflow) or was skipped,
# so let's try now with uint64.
try:
res = data.astype('u8', copy=False)
if (res == data).all():
return UInt64Index(res, copy=copy, name=name)
except (OverflowError, TypeError, ValueError):
pass
raise ValueError
|
python
|
def _try_convert_to_int_index(cls, data, copy, name, dtype):
"""
Attempt to convert an array of data into an integer index.
Parameters
----------
data : The data to convert.
copy : Whether to copy the data or not.
name : The name of the index returned.
Returns
-------
int_index : data converted to either an Int64Index or a
UInt64Index
Raises
------
ValueError if the conversion was not successful.
"""
from .numeric import Int64Index, UInt64Index
if not is_unsigned_integer_dtype(dtype):
# skip int64 conversion attempt if uint-like dtype is passed, as
# this could return Int64Index when UInt64Index is what's desrired
try:
res = data.astype('i8', copy=False)
if (res == data).all():
return Int64Index(res, copy=copy, name=name)
except (OverflowError, TypeError, ValueError):
pass
# Conversion to int64 failed (possibly due to overflow) or was skipped,
# so let's try now with uint64.
try:
res = data.astype('u8', copy=False)
if (res == data).all():
return UInt64Index(res, copy=copy, name=name)
except (OverflowError, TypeError, ValueError):
pass
raise ValueError
|
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|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L3746-L3786
|
train
|
Try to convert an array of data into an integer index.
|
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pandas-dev/pandas
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pandas/core/indexes/base.py
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Index._get_reconciled_name_object
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def _get_reconciled_name_object(self, other):
"""
If the result of a set operation will be self,
return self, unless the name changes, in which
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"""
name = get_op_result_name(self, other)
if self.name != name:
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return self
|
python
|
def _get_reconciled_name_object(self, other):
"""
If the result of a set operation will be self,
return self, unless the name changes, in which
case make a shallow copy of self.
"""
name = get_op_result_name(self, other)
if self.name != name:
return self._shallow_copy(name=name)
return self
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/indexes/base.py#L2234-L2243
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train
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apache/spark
|
python/pyspark/sql/session.py
|
SparkSession.getActiveSession
|
def getActiveSession(cls):
"""
Returns the active SparkSession for the current thread, returned by the builder.
>>> s = SparkSession.getActiveSession()
>>> l = [('Alice', 1)]
>>> rdd = s.sparkContext.parallelize(l)
>>> df = s.createDataFrame(rdd, ['name', 'age'])
>>> df.select("age").collect()
[Row(age=1)]
"""
from pyspark import SparkContext
sc = SparkContext._active_spark_context
if sc is None:
return None
else:
if sc._jvm.SparkSession.getActiveSession().isDefined():
SparkSession(sc, sc._jvm.SparkSession.getActiveSession().get())
return SparkSession._activeSession
else:
return None
|
python
|
def getActiveSession(cls):
"""
Returns the active SparkSession for the current thread, returned by the builder.
>>> s = SparkSession.getActiveSession()
>>> l = [('Alice', 1)]
>>> rdd = s.sparkContext.parallelize(l)
>>> df = s.createDataFrame(rdd, ['name', 'age'])
>>> df.select("age").collect()
[Row(age=1)]
"""
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sc = SparkContext._active_spark_context
if sc is None:
return None
else:
if sc._jvm.SparkSession.getActiveSession().isDefined():
SparkSession(sc, sc._jvm.SparkSession.getActiveSession().get())
return SparkSession._activeSession
else:
return None
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/session.py#L263-L282
|
train
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pandas-dev/pandas
|
pandas/_config/config.py
|
_build_option_description
|
def _build_option_description(k):
""" Builds a formatted description of a registered option and prints it """
o = _get_registered_option(k)
d = _get_deprecated_option(k)
s = '{k} '.format(k=k)
if o.doc:
s += '\n'.join(o.doc.strip().split('\n'))
else:
s += 'No description available.'
if o:
s += ('\n [default: {default}] [currently: {current}]'
.format(default=o.defval, current=_get_option(k, True)))
if d:
s += '\n (Deprecated'
s += (', use `{rkey}` instead.'
.format(rkey=d.rkey if d.rkey else ''))
s += ')'
return s
|
python
|
def _build_option_description(k):
""" Builds a formatted description of a registered option and prints it """
o = _get_registered_option(k)
d = _get_deprecated_option(k)
s = '{k} '.format(k=k)
if o.doc:
s += '\n'.join(o.doc.strip().split('\n'))
else:
s += 'No description available.'
if o:
s += ('\n [default: {default}] [currently: {current}]'
.format(default=o.defval, current=_get_option(k, True)))
if d:
s += '\n (Deprecated'
s += (', use `{rkey}` instead.'
.format(rkey=d.rkey if d.rkey else ''))
s += ')'
return s
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
|
https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/_config/config.py#L636-L659
|
train
|
Builds a formatted description of a registered option and prints it
|
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apache/spark
|
python/pyspark/mllib/classification.py
|
NaiveBayes.train
|
def train(cls, data, lambda_=1.0):
"""
Train a Naive Bayes model given an RDD of (label, features)
vectors.
This is the Multinomial NB (U{http://tinyurl.com/lsdw6p}) which
can handle all kinds of discrete data. For example, by
converting documents into TF-IDF vectors, it can be used for
document classification. By making every vector a 0-1 vector,
it can also be used as Bernoulli NB (U{http://tinyurl.com/p7c96j6}).
The input feature values must be nonnegative.
:param data:
RDD of LabeledPoint.
:param lambda_:
The smoothing parameter.
(default: 1.0)
"""
first = data.first()
if not isinstance(first, LabeledPoint):
raise ValueError("`data` should be an RDD of LabeledPoint")
labels, pi, theta = callMLlibFunc("trainNaiveBayesModel", data, lambda_)
return NaiveBayesModel(labels.toArray(), pi.toArray(), numpy.array(theta))
|
python
|
def train(cls, data, lambda_=1.0):
"""
Train a Naive Bayes model given an RDD of (label, features)
vectors.
This is the Multinomial NB (U{http://tinyurl.com/lsdw6p}) which
can handle all kinds of discrete data. For example, by
converting documents into TF-IDF vectors, it can be used for
document classification. By making every vector a 0-1 vector,
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The input feature values must be nonnegative.
:param data:
RDD of LabeledPoint.
:param lambda_:
The smoothing parameter.
(default: 1.0)
"""
first = data.first()
if not isinstance(first, LabeledPoint):
raise ValueError("`data` should be an RDD of LabeledPoint")
labels, pi, theta = callMLlibFunc("trainNaiveBayesModel", data, lambda_)
return NaiveBayesModel(labels.toArray(), pi.toArray(), numpy.array(theta))
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Train a Naive Bayes model given an RDD of (label, features)
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/mllib/classification.py#L657-L679
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train
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Train a Naive Bayes model given an RDD of LabeledPoint vectors.
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pandas-dev/pandas
|
pandas/core/internals/blocks.py
|
Block.concat_same_type
|
def concat_same_type(self, to_concat, placement=None):
"""
Concatenate list of single blocks of the same type.
"""
values = self._concatenator([blk.values for blk in to_concat],
axis=self.ndim - 1)
return self.make_block_same_class(
values, placement=placement or slice(0, len(values), 1))
|
python
|
def concat_same_type(self, to_concat, placement=None):
"""
Concatenate list of single blocks of the same type.
"""
values = self._concatenator([blk.values for blk in to_concat],
axis=self.ndim - 1)
return self.make_block_same_class(
values, placement=placement or slice(0, len(values), 1))
|
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/internals/blocks.py#L308-L315
|
train
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Concatenate a list of single blocks of the same type.
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apache/spark
|
python/pyspark/sql/streaming.py
|
DataStreamWriter.start
|
def start(self, path=None, format=None, outputMode=None, partitionBy=None, queryName=None,
**options):
"""Streams the contents of the :class:`DataFrame` to a data source.
The data source is specified by the ``format`` and a set of ``options``.
If ``format`` is not specified, the default data source configured by
``spark.sql.sources.default`` will be used.
.. note:: Evolving.
:param path: the path in a Hadoop supported file system
:param format: the format used to save
:param outputMode: specifies how data of a streaming DataFrame/Dataset is written to a
streaming sink.
* `append`:Only the new rows in the streaming DataFrame/Dataset will be written to the
sink
* `complete`:All the rows in the streaming DataFrame/Dataset will be written to the sink
every time these is some updates
* `update`:only the rows that were updated in the streaming DataFrame/Dataset will be
written to the sink every time there are some updates. If the query doesn't contain
aggregations, it will be equivalent to `append` mode.
:param partitionBy: names of partitioning columns
:param queryName: unique name for the query
:param options: All other string options. You may want to provide a `checkpointLocation`
for most streams, however it is not required for a `memory` stream.
>>> sq = sdf.writeStream.format('memory').queryName('this_query').start()
>>> sq.isActive
True
>>> sq.name
u'this_query'
>>> sq.stop()
>>> sq.isActive
False
>>> sq = sdf.writeStream.trigger(processingTime='5 seconds').start(
... queryName='that_query', outputMode="append", format='memory')
>>> sq.name
u'that_query'
>>> sq.isActive
True
>>> sq.stop()
"""
self.options(**options)
if outputMode is not None:
self.outputMode(outputMode)
if partitionBy is not None:
self.partitionBy(partitionBy)
if format is not None:
self.format(format)
if queryName is not None:
self.queryName(queryName)
if path is None:
return self._sq(self._jwrite.start())
else:
return self._sq(self._jwrite.start(path))
|
python
|
def start(self, path=None, format=None, outputMode=None, partitionBy=None, queryName=None,
**options):
"""Streams the contents of the :class:`DataFrame` to a data source.
The data source is specified by the ``format`` and a set of ``options``.
If ``format`` is not specified, the default data source configured by
``spark.sql.sources.default`` will be used.
.. note:: Evolving.
:param path: the path in a Hadoop supported file system
:param format: the format used to save
:param outputMode: specifies how data of a streaming DataFrame/Dataset is written to a
streaming sink.
* `append`:Only the new rows in the streaming DataFrame/Dataset will be written to the
sink
* `complete`:All the rows in the streaming DataFrame/Dataset will be written to the sink
every time these is some updates
* `update`:only the rows that were updated in the streaming DataFrame/Dataset will be
written to the sink every time there are some updates. If the query doesn't contain
aggregations, it will be equivalent to `append` mode.
:param partitionBy: names of partitioning columns
:param queryName: unique name for the query
:param options: All other string options. You may want to provide a `checkpointLocation`
for most streams, however it is not required for a `memory` stream.
>>> sq = sdf.writeStream.format('memory').queryName('this_query').start()
>>> sq.isActive
True
>>> sq.name
u'this_query'
>>> sq.stop()
>>> sq.isActive
False
>>> sq = sdf.writeStream.trigger(processingTime='5 seconds').start(
... queryName='that_query', outputMode="append", format='memory')
>>> sq.name
u'that_query'
>>> sq.isActive
True
>>> sq.stop()
"""
self.options(**options)
if outputMode is not None:
self.outputMode(outputMode)
if partitionBy is not None:
self.partitionBy(partitionBy)
if format is not None:
self.format(format)
if queryName is not None:
self.queryName(queryName)
if path is None:
return self._sq(self._jwrite.start())
else:
return self._sq(self._jwrite.start(path))
|
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.. note:: Evolving.
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:param format: the format used to save
:param outputMode: specifies how data of a streaming DataFrame/Dataset is written to a
streaming sink.
* `append`:Only the new rows in the streaming DataFrame/Dataset will be written to the
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:param queryName: unique name for the query
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>>> sq = sdf.writeStream.format('memory').queryName('this_query').start()
>>> sq.isActive
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>>> sq.name
u'this_query'
>>> sq.stop()
>>> sq.isActive
False
>>> sq = sdf.writeStream.trigger(processingTime='5 seconds').start(
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>>> sq.name
u'that_query'
>>> sq.isActive
True
>>> sq.stop()
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/streaming.py#L1073-L1128
|
train
|
Streams the contents of the DataFrame to a data source.
|
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apache/spark
|
python/pyspark/streaming/context.py
|
StreamingContext.getActiveOrCreate
|
def getActiveOrCreate(cls, checkpointPath, setupFunc):
"""
Either return the active StreamingContext (i.e. currently started but not stopped),
or recreate a StreamingContext from checkpoint data or create a new StreamingContext
using the provided setupFunc function. If the checkpointPath is None or does not contain
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activeContext = cls.getActive()
if activeContext is not None:
return activeContext
elif checkpointPath is not None:
return cls.getOrCreate(checkpointPath, setupFunc)
else:
return setupFunc()
|
python
|
def getActiveOrCreate(cls, checkpointPath, setupFunc):
"""
Either return the active StreamingContext (i.e. currently started but not stopped),
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if setupFunc is None:
raise Exception("setupFunc cannot be None")
activeContext = cls.getActive()
if activeContext is not None:
return activeContext
elif checkpointPath is not None:
return cls.getOrCreate(checkpointPath, setupFunc)
else:
return setupFunc()
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/streaming/context.py#L144-L166
|
train
|
Returns the active StreamingContext or creates a new StreamingContext if it does not exist.
|
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apache/spark
|
python/pyspark/context.py
|
SparkContext._serialize_to_jvm
|
def _serialize_to_jvm(self, data, serializer, reader_func, createRDDServer):
"""
Using py4j to send a large dataset to the jvm is really slow, so we use either a file
or a socket if we have encryption enabled.
:param data:
:param serializer:
:param reader_func: A function which takes a filename and reads in the data in the jvm and
returns a JavaRDD. Only used when encryption is disabled.
:param createRDDServer: A function which creates a PythonRDDServer in the jvm to
accept the serialized data, for use when encryption is enabled.
:return:
"""
if self._encryption_enabled:
# with encryption, we open a server in java and send the data directly
server = createRDDServer()
(sock_file, _) = local_connect_and_auth(server.port(), server.secret())
chunked_out = ChunkedStream(sock_file, 8192)
serializer.dump_stream(data, chunked_out)
chunked_out.close()
# this call will block until the server has read all the data and processed it (or
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r = server.getResult()
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tempFile = NamedTemporaryFile(delete=False, dir=self._temp_dir)
try:
try:
serializer.dump_stream(data, tempFile)
finally:
tempFile.close()
return reader_func(tempFile.name)
finally:
# we eagerily reads the file so we can delete right after.
os.unlink(tempFile.name)
|
python
|
def _serialize_to_jvm(self, data, serializer, reader_func, createRDDServer):
"""
Using py4j to send a large dataset to the jvm is really slow, so we use either a file
or a socket if we have encryption enabled.
:param data:
:param serializer:
:param reader_func: A function which takes a filename and reads in the data in the jvm and
returns a JavaRDD. Only used when encryption is disabled.
:param createRDDServer: A function which creates a PythonRDDServer in the jvm to
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:return:
"""
if self._encryption_enabled:
# with encryption, we open a server in java and send the data directly
server = createRDDServer()
(sock_file, _) = local_connect_and_auth(server.port(), server.secret())
chunked_out = ChunkedStream(sock_file, 8192)
serializer.dump_stream(data, chunked_out)
chunked_out.close()
# this call will block until the server has read all the data and processed it (or
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r = server.getResult()
return r
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# without encryption, we serialize to a file, and we read the file in java and
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tempFile = NamedTemporaryFile(delete=False, dir=self._temp_dir)
try:
try:
serializer.dump_stream(data, tempFile)
finally:
tempFile.close()
return reader_func(tempFile.name)
finally:
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os.unlink(tempFile.name)
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/context.py#L531-L566
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train
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python/pyspark/mllib/evaluation.py
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MultilabelMetrics.precision
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def precision(self, label=None):
"""
Returns precision or precision for a given label (category) if specified.
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if label is None:
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else:
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|
python
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def precision(self, label=None):
"""
Returns precision or precision for a given label (category) if specified.
"""
if label is None:
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return self.call("precision", float(label))
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618d6bff71073c8c93501ab7392c3cc579730f0b
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train
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