Dataset Viewer
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stringclasses 4
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pandas-dev/pandas
|
pandas/core/groupby/groupby.py
|
GroupBy.head
|
def head(self, n=5):
"""
Return first n rows of each group.
Essentially equivalent to ``.apply(lambda x: x.head(n))``,
except ignores as_index flag.
%(see_also)s
Examples
--------
>>> df = pd.DataFrame([[1, 2], [1, 4], [5, 6]],
columns=['A', 'B'])
>>> df.groupby('A', as_index=False).head(1)
A B
0 1 2
2 5 6
>>> df.groupby('A').head(1)
A B
0 1 2
2 5 6
"""
self._reset_group_selection()
mask = self._cumcount_array() < n
return self._selected_obj[mask]
|
python
|
def head(self, n=5):
"""
Return first n rows of each group.
Essentially equivalent to ``.apply(lambda x: x.head(n))``,
except ignores as_index flag.
%(see_also)s
Examples
--------
>>> df = pd.DataFrame([[1, 2], [1, 4], [5, 6]],
columns=['A', 'B'])
>>> df.groupby('A', as_index=False).head(1)
A B
0 1 2
2 5 6
>>> df.groupby('A').head(1)
A B
0 1 2
2 5 6
"""
self._reset_group_selection()
mask = self._cumcount_array() < n
return self._selected_obj[mask]
|
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Return first n rows of each group.
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%(see_also)s
Examples
--------
>>> df = pd.DataFrame([[1, 2], [1, 4], [5, 6]],
columns=['A', 'B'])
>>> df.groupby('A', as_index=False).head(1)
A B
0 1 2
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>>> df.groupby('A').head(1)
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9feb3ad92cc0397a04b665803a49299ee7aa1037
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https://github.com/pandas-dev/pandas/blob/9feb3ad92cc0397a04b665803a49299ee7aa1037/pandas/core/groupby/groupby.py#L2137-L2160
|
train
|
Return first n rows of each group.
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apache/spark
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python/pyspark/mllib/util.py
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MLUtils.appendBias
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def appendBias(data):
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Returns a new vector with `1.0` (bias) appended to
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vec = _convert_to_vector(data)
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return SparseVector(len(vec) + 1, newIndices, newValues)
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|
python
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def appendBias(data):
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Returns a new vector with `1.0` (bias) appended to
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"""
vec = _convert_to_vector(data)
if isinstance(vec, SparseVector):
newIndices = np.append(vec.indices, len(vec))
newValues = np.append(vec.values, 1.0)
return SparseVector(len(vec) + 1, newIndices, newValues)
else:
return _convert_to_vector(np.append(vec.toArray(), 1.0))
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apache/spark
|
python/pyspark/shuffle.py
|
ExternalGroupBy._spill
|
def _spill(self):
"""
dump already partitioned data into disks.
"""
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
# data 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)]
# If the number of keys is small, then the overhead of sort is small
# sort them before dumping into disks
self._sorted = len(self.data) < self.SORT_KEY_LIMIT
if self._sorted:
self.serializer = self.flattened_serializer()
for k in sorted(self.data.keys()):
h = self._partition(k)
self.serializer.dump_stream([(k, self.data[k])], streams[h])
else:
for k, v in self.data.items():
h = self._partition(k)
self.serializer.dump_stream([(k, v)], streams[h])
for s in streams:
DiskBytesSpilled += s.tell()
s.close()
self.data.clear()
# self.pdata is cached in `mergeValues` and `mergeCombiners`
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
if self._sorted:
# sort by key only (stable)
sorted_items = sorted(self.pdata[i].items(), key=operator.itemgetter(0))
self.serializer.dump_stream(sorted_items, f)
else:
self.serializer.dump_stream(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.
"""
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
# data 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)]
# If the number of keys is small, then the overhead of sort is small
# sort them before dumping into disks
self._sorted = len(self.data) < self.SORT_KEY_LIMIT
if self._sorted:
self.serializer = self.flattened_serializer()
for k in sorted(self.data.keys()):
h = self._partition(k)
self.serializer.dump_stream([(k, self.data[k])], streams[h])
else:
for k, v in self.data.items():
h = self._partition(k)
self.serializer.dump_stream([(k, v)], streams[h])
for s in streams:
DiskBytesSpilled += s.tell()
s.close()
self.data.clear()
# self.pdata is cached in `mergeValues` and `mergeCombiners`
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
if self._sorted:
# sort by key only (stable)
sorted_items = sorted(self.pdata[i].items(), key=operator.itemgetter(0))
self.serializer.dump_stream(sorted_items, f)
else:
self.serializer.dump_stream(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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dump already partitioned data into disks.
|
[
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/shuffle.py#L709-L766
|
train
|
Dump already partitioned data into disks.
|
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huggingface/pytorch-pretrained-BERT
|
pytorch_pretrained_bert/modeling_transfo_xl.py
|
TransfoXLPreTrainedModel.from_pretrained
|
def from_pretrained(cls, pretrained_model_name_or_path, state_dict=None, cache_dir=None,
from_tf=False, *inputs, **kwargs):
"""
Instantiate a TransfoXLPreTrainedModel from a pre-trained model file or a pytorch state dict.
Download and cache the pre-trained model file if needed.
Params:
pretrained_model_name_or_path: either:
- a str with the name of a pre-trained model to load selected in the list of:
. `transfo-xl`
- a path or url to a pretrained model archive containing:
. `transfo_xl_config.json` a configuration file for the model
. `pytorch_model.bin` a PyTorch dump of a TransfoXLModel instance
- a path or url to a pretrained model archive containing:
. `bert_config.json` a configuration file for the model
. `model.chkpt` a TensorFlow checkpoint
from_tf: should we load the weights from a locally saved TensorFlow checkpoint
cache_dir: an optional path to a folder in which the pre-trained models will be cached.
state_dict: an optional state dictionnary (collections.OrderedDict object) to use instead of pre-trained models
*inputs, **kwargs: additional input for the specific Bert class
(ex: num_labels for BertForSequenceClassification)
"""
if pretrained_model_name_or_path in PRETRAINED_MODEL_ARCHIVE_MAP:
archive_file = PRETRAINED_MODEL_ARCHIVE_MAP[pretrained_model_name_or_path]
config_file = PRETRAINED_CONFIG_ARCHIVE_MAP[pretrained_model_name_or_path]
else:
archive_file = os.path.join(pretrained_model_name_or_path, WEIGHTS_NAME)
config_file = os.path.join(pretrained_model_name_or_path, CONFIG_NAME)
# redirect to the cache, if necessary
try:
resolved_archive_file = cached_path(archive_file, cache_dir=cache_dir)
resolved_config_file = cached_path(config_file, cache_dir=cache_dir)
except EnvironmentError:
logger.error(
"Model name '{}' was not found in model name list ({}). "
"We assumed '{}' was a path or url but couldn't find files {} and {} "
"at this path or url.".format(
pretrained_model_name_or_path,
', '.join(PRETRAINED_MODEL_ARCHIVE_MAP.keys()),
pretrained_model_name_or_path,
archive_file, config_file))
return None
if resolved_archive_file == archive_file and resolved_config_file == config_file:
logger.info("loading weights file {}".format(archive_file))
logger.info("loading configuration file {}".format(config_file))
else:
logger.info("loading weights file {} from cache at {}".format(
archive_file, resolved_archive_file))
logger.info("loading configuration file {} from cache at {}".format(
config_file, resolved_config_file))
# Load config
config = TransfoXLConfig.from_json_file(resolved_config_file)
logger.info("Model config {}".format(config))
# Instantiate model.
model = cls(config, *inputs, **kwargs)
if state_dict is None and not from_tf:
state_dict = torch.load(resolved_archive_file, map_location='cpu')
if from_tf:
# Directly load from a TensorFlow checkpoint
return load_tf_weights_in_transfo_xl(model, config, pretrained_model_name_or_path)
missing_keys = []
unexpected_keys = []
error_msgs = []
# copy state_dict so _load_from_state_dict can modify it
metadata = getattr(state_dict, '_metadata', None)
state_dict = state_dict.copy()
if metadata is not None:
state_dict._metadata = metadata
def load(module, prefix=''):
local_metadata = {} if metadata is None else metadata.get(prefix[:-1], {})
module._load_from_state_dict(
state_dict, prefix, local_metadata, True, missing_keys, unexpected_keys, error_msgs)
for name, child in module._modules.items():
if child is not None:
load(child, prefix + name + '.')
start_prefix = ''
if not hasattr(model, 'transformer') and any(s.startswith('transformer.') for s in state_dict.keys()):
start_prefix = 'transformer.'
load(model, prefix=start_prefix)
if len(missing_keys) > 0:
logger.info("Weights of {} not initialized from pretrained model: {}".format(
model.__class__.__name__, missing_keys))
if len(unexpected_keys) > 0:
logger.info("Weights from pretrained model not used in {}: {}".format(
model.__class__.__name__, unexpected_keys))
if len(error_msgs) > 0:
raise RuntimeError('Error(s) in loading state_dict for {}:\n\t{}'.format(
model.__class__.__name__, "\n\t".join(error_msgs)))
# Make sure we are still sharing the input and output embeddings
if hasattr(model, 'tie_weights'):
model.tie_weights()
return model
|
python
|
def from_pretrained(cls, pretrained_model_name_or_path, state_dict=None, cache_dir=None,
from_tf=False, *inputs, **kwargs):
"""
Instantiate a TransfoXLPreTrainedModel from a pre-trained model file or a pytorch state dict.
Download and cache the pre-trained model file if needed.
Params:
pretrained_model_name_or_path: either:
- a str with the name of a pre-trained model to load selected in the list of:
. `transfo-xl`
- a path or url to a pretrained model archive containing:
. `transfo_xl_config.json` a configuration file for the model
. `pytorch_model.bin` a PyTorch dump of a TransfoXLModel instance
- a path or url to a pretrained model archive containing:
. `bert_config.json` a configuration file for the model
. `model.chkpt` a TensorFlow checkpoint
from_tf: should we load the weights from a locally saved TensorFlow checkpoint
cache_dir: an optional path to a folder in which the pre-trained models will be cached.
state_dict: an optional state dictionnary (collections.OrderedDict object) to use instead of pre-trained models
*inputs, **kwargs: additional input for the specific Bert class
(ex: num_labels for BertForSequenceClassification)
"""
if pretrained_model_name_or_path in PRETRAINED_MODEL_ARCHIVE_MAP:
archive_file = PRETRAINED_MODEL_ARCHIVE_MAP[pretrained_model_name_or_path]
config_file = PRETRAINED_CONFIG_ARCHIVE_MAP[pretrained_model_name_or_path]
else:
archive_file = os.path.join(pretrained_model_name_or_path, WEIGHTS_NAME)
config_file = os.path.join(pretrained_model_name_or_path, CONFIG_NAME)
# redirect to the cache, if necessary
try:
resolved_archive_file = cached_path(archive_file, cache_dir=cache_dir)
resolved_config_file = cached_path(config_file, cache_dir=cache_dir)
except EnvironmentError:
logger.error(
"Model name '{}' was not found in model name list ({}). "
"We assumed '{}' was a path or url but couldn't find files {} and {} "
"at this path or url.".format(
pretrained_model_name_or_path,
', '.join(PRETRAINED_MODEL_ARCHIVE_MAP.keys()),
pretrained_model_name_or_path,
archive_file, config_file))
return None
if resolved_archive_file == archive_file and resolved_config_file == config_file:
logger.info("loading weights file {}".format(archive_file))
logger.info("loading configuration file {}".format(config_file))
else:
logger.info("loading weights file {} from cache at {}".format(
archive_file, resolved_archive_file))
logger.info("loading configuration file {} from cache at {}".format(
config_file, resolved_config_file))
# Load config
config = TransfoXLConfig.from_json_file(resolved_config_file)
logger.info("Model config {}".format(config))
# Instantiate model.
model = cls(config, *inputs, **kwargs)
if state_dict is None and not from_tf:
state_dict = torch.load(resolved_archive_file, map_location='cpu')
if from_tf:
# Directly load from a TensorFlow checkpoint
return load_tf_weights_in_transfo_xl(model, config, pretrained_model_name_or_path)
missing_keys = []
unexpected_keys = []
error_msgs = []
# copy state_dict so _load_from_state_dict can modify it
metadata = getattr(state_dict, '_metadata', None)
state_dict = state_dict.copy()
if metadata is not None:
state_dict._metadata = metadata
def load(module, prefix=''):
local_metadata = {} if metadata is None else metadata.get(prefix[:-1], {})
module._load_from_state_dict(
state_dict, prefix, local_metadata, True, missing_keys, unexpected_keys, error_msgs)
for name, child in module._modules.items():
if child is not None:
load(child, prefix + name + '.')
start_prefix = ''
if not hasattr(model, 'transformer') and any(s.startswith('transformer.') for s in state_dict.keys()):
start_prefix = 'transformer.'
load(model, prefix=start_prefix)
if len(missing_keys) > 0:
logger.info("Weights of {} not initialized from pretrained model: {}".format(
model.__class__.__name__, missing_keys))
if len(unexpected_keys) > 0:
logger.info("Weights from pretrained model not used in {}: {}".format(
model.__class__.__name__, unexpected_keys))
if len(error_msgs) > 0:
raise RuntimeError('Error(s) in loading state_dict for {}:\n\t{}'.format(
model.__class__.__name__, "\n\t".join(error_msgs)))
# Make sure we are still sharing the input and output embeddings
if hasattr(model, 'tie_weights'):
model.tie_weights()
return model
|
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] |
Instantiate a TransfoXLPreTrainedModel from a pre-trained model file or a pytorch state dict.
Download and cache the pre-trained model file if needed.
Params:
pretrained_model_name_or_path: either:
- a str with the name of a pre-trained model to load selected in the list of:
. `transfo-xl`
- a path or url to a pretrained model archive containing:
. `transfo_xl_config.json` a configuration file for the model
. `pytorch_model.bin` a PyTorch dump of a TransfoXLModel instance
- a path or url to a pretrained model archive containing:
. `bert_config.json` a configuration file for the model
. `model.chkpt` a TensorFlow checkpoint
from_tf: should we load the weights from a locally saved TensorFlow checkpoint
cache_dir: an optional path to a folder in which the pre-trained models will be cached.
state_dict: an optional state dictionnary (collections.OrderedDict object) to use instead of pre-trained models
*inputs, **kwargs: additional input for the specific Bert class
(ex: num_labels for BertForSequenceClassification)
|
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b832d5bb8a6dfc5965015b828e577677eace601e
|
https://github.com/huggingface/pytorch-pretrained-BERT/blob/b832d5bb8a6dfc5965015b828e577677eace601e/pytorch_pretrained_bert/modeling_transfo_xl.py#L891-L986
|
train
|
Instantiate a TransfoXLPreTrainedModel from a pre - trained model file or a pytorch state dict.
|
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apache/spark
|
python/pyspark/rdd.py
|
RDD.aggregate
|
def aggregate(self, zeroValue, seqOp, combOp):
"""
Aggregate the elements of each partition, and then the results for all
the partitions, using a given combine functions and a neutral "zero
value."
The functions C{op(t1, t2)} is allowed to modify C{t1} and return it
as its result value to avoid object allocation; however, it should not
modify C{t2}.
The first function (seqOp) can return a different result type, U, than
the type of this RDD. Thus, we need one operation for merging a T into
an U and one operation for merging two U
>>> seqOp = (lambda x, y: (x[0] + y, x[1] + 1))
>>> combOp = (lambda x, y: (x[0] + y[0], x[1] + y[1]))
>>> sc.parallelize([1, 2, 3, 4]).aggregate((0, 0), seqOp, combOp)
(10, 4)
>>> sc.parallelize([]).aggregate((0, 0), seqOp, combOp)
(0, 0)
"""
seqOp = fail_on_stopiteration(seqOp)
combOp = fail_on_stopiteration(combOp)
def func(iterator):
acc = zeroValue
for obj in iterator:
acc = seqOp(acc, obj)
yield acc
# collecting result of mapPartitions here ensures that the copy of
# zeroValue provided to each partition is unique from the one provided
# to the final reduce call
vals = self.mapPartitions(func).collect()
return reduce(combOp, vals, zeroValue)
|
python
|
def aggregate(self, zeroValue, seqOp, combOp):
"""
Aggregate the elements of each partition, and then the results for all
the partitions, using a given combine functions and a neutral "zero
value."
The functions C{op(t1, t2)} is allowed to modify C{t1} and return it
as its result value to avoid object allocation; however, it should not
modify C{t2}.
The first function (seqOp) can return a different result type, U, than
the type of this RDD. Thus, we need one operation for merging a T into
an U and one operation for merging two U
>>> seqOp = (lambda x, y: (x[0] + y, x[1] + 1))
>>> combOp = (lambda x, y: (x[0] + y[0], x[1] + y[1]))
>>> sc.parallelize([1, 2, 3, 4]).aggregate((0, 0), seqOp, combOp)
(10, 4)
>>> sc.parallelize([]).aggregate((0, 0), seqOp, combOp)
(0, 0)
"""
seqOp = fail_on_stopiteration(seqOp)
combOp = fail_on_stopiteration(combOp)
def func(iterator):
acc = zeroValue
for obj in iterator:
acc = seqOp(acc, obj)
yield acc
# collecting result of mapPartitions here ensures that the copy of
# zeroValue provided to each partition is unique from the one provided
# to the final reduce call
vals = self.mapPartitions(func).collect()
return reduce(combOp, vals, zeroValue)
|
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The functions C{op(t1, t2)} is allowed to modify C{t1} and return it
as its result value to avoid object allocation; however, it should not
modify C{t2}.
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>>> seqOp = (lambda x, y: (x[0] + y, x[1] + 1))
>>> combOp = (lambda x, y: (x[0] + y[0], x[1] + y[1]))
>>> sc.parallelize([1, 2, 3, 4]).aggregate((0, 0), seqOp, combOp)
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>>> sc.parallelize([]).aggregate((0, 0), seqOp, combOp)
(0, 0)
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L922-L955
|
train
|
Aggregate the elements of each partition and then the results for all the partitions using a given combine functions and a neutral zeroValue value.
|
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apache/spark
|
python/pyspark/sql/functions.py
|
array_position
|
def array_position(col, value):
"""
Collection function: Locates the position of the first occurrence of the given value
in the given array. Returns null if either of the arguments are null.
.. note:: The position is not zero based, but 1 based index. Returns 0 if the given
value could not be found in the array.
>>> df = spark.createDataFrame([(["c", "b", "a"],), ([],)], ['data'])
>>> df.select(array_position(df.data, "a")).collect()
[Row(array_position(data, a)=3), Row(array_position(data, a)=0)]
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.array_position(_to_java_column(col), value))
|
python
|
def array_position(col, value):
"""
Collection function: Locates the position of the first occurrence of the given value
in the given array. Returns null if either of the arguments are null.
.. note:: The position is not zero based, but 1 based index. Returns 0 if the given
value could not be found in the array.
>>> df = spark.createDataFrame([(["c", "b", "a"],), ([],)], ['data'])
>>> df.select(array_position(df.data, "a")).collect()
[Row(array_position(data, a)=3), Row(array_position(data, a)=0)]
"""
sc = SparkContext._active_spark_context
return Column(sc._jvm.functions.array_position(_to_java_column(col), value))
|
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Collection function: Locates the position of the first occurrence of the given value
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value could not be found in the array.
>>> df = spark.createDataFrame([(["c", "b", "a"],), ([],)], ['data'])
>>> df.select(array_position(df.data, "a")).collect()
[Row(array_position(data, a)=3), Row(array_position(data, a)=0)]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/functions.py#L2016-L2029
|
train
|
Returns the position of the first occurrence of the given value in the given column in the given array.
|
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apache/spark
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python/pyspark/ml/regression.py
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GeneralizedLinearRegressionModel.summary
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def summary(self):
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if self.hasSummary:
return GeneralizedLinearRegressionTrainingSummary(
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|
python
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def summary(self):
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Gets summary (e.g. residuals, deviance, pValues) of model on
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if self.hasSummary:
return GeneralizedLinearRegressionTrainingSummary(
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raise RuntimeError("No training summary available for this %s" %
self.__class__.__name__)
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/ml/regression.py#L1679-L1690
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train
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python/pyspark/sql/dataframe.py
|
DataFrame._repr_html_
|
def _repr_html_(self):
"""Returns a dataframe with html code when you enabled eager evaluation
by 'spark.sql.repl.eagerEval.enabled', this only called by REPL you are
using support eager evaluation with HTML.
"""
import cgi
if not self._support_repr_html:
self._support_repr_html = True
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max_num_rows = max(self.sql_ctx._conf.replEagerEvalMaxNumRows(), 0)
sock_info = self._jdf.getRowsToPython(
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rows = list(_load_from_socket(sock_info, BatchedSerializer(PickleSerializer())))
head = rows[0]
row_data = rows[1:]
has_more_data = len(row_data) > max_num_rows
row_data = row_data[:max_num_rows]
html = "<table border='1'>\n"
# generate table head
html += "<tr><th>%s</th></tr>\n" % "</th><th>".join(map(lambda x: cgi.escape(x), head))
# generate table rows
for row in row_data:
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html += "</table>\n"
if has_more_data:
html += "only showing top %d %s\n" % (
max_num_rows, "row" if max_num_rows == 1 else "rows")
return html
else:
return None
|
python
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def _repr_html_(self):
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"""
import cgi
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html = "<table border='1'>\n"
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if has_more_data:
html += "only showing top %d %s\n" % (
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return html
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return None
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/dataframe.py#L372-L403
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train
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apache/spark
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python/pyspark/rdd.py
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RDD.collect
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def collect(self):
"""
Return a list that contains all of the elements in this RDD.
.. note:: This method should only be used if the resulting array is expected
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sock_info = self.ctx._jvm.PythonRDD.collectAndServe(self._jrdd.rdd())
return list(_load_from_socket(sock_info, self._jrdd_deserializer))
|
python
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def collect(self):
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"""
with SCCallSiteSync(self.context) as css:
sock_info = self.ctx._jvm.PythonRDD.collectAndServe(self._jrdd.rdd())
return list(_load_from_socket(sock_info, self._jrdd_deserializer))
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L810-L819
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train
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apache/spark
|
python/pyspark/sql/utils.py
|
require_minimum_pandas_version
|
def require_minimum_pandas_version():
""" Raise ImportError if minimum version of Pandas is not installed
"""
# TODO(HyukjinKwon): Relocate and deduplicate the version specification.
minimum_pandas_version = "0.19.2"
from distutils.version import LooseVersion
try:
import pandas
have_pandas = True
except ImportError:
have_pandas = False
if not have_pandas:
raise ImportError("Pandas >= %s must be installed; however, "
"it was not found." % minimum_pandas_version)
if LooseVersion(pandas.__version__) < LooseVersion(minimum_pandas_version):
raise ImportError("Pandas >= %s must be installed; however, "
"your version was %s." % (minimum_pandas_version, pandas.__version__))
|
python
|
def require_minimum_pandas_version():
""" Raise ImportError if minimum version of Pandas is not installed
"""
# TODO(HyukjinKwon): Relocate and deduplicate the version specification.
minimum_pandas_version = "0.19.2"
from distutils.version import LooseVersion
try:
import pandas
have_pandas = True
except ImportError:
have_pandas = False
if not have_pandas:
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raise ImportError("Pandas >= %s must be installed; however, "
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/utils.py#L130-L147
|
train
|
Raise ImportError if minimum version of Pandas is not installed.
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python/pyspark/mllib/linalg/__init__.py
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DenseMatrix.asML
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apache/spark
|
python/pyspark/heapq3.py
|
nsmallest
|
def nsmallest(n, iterable, key=None):
"""Find the n smallest elements in a dataset.
Equivalent to: sorted(iterable, key=key)[:n]
"""
# Short-cut for n==1 is to use min()
if n == 1:
it = iter(iterable)
sentinel = object()
if key is None:
result = min(it, default=sentinel)
else:
result = min(it, default=sentinel, key=key)
return [] if result is sentinel else [result]
# When n>=size, it's faster to use sorted()
try:
size = len(iterable)
except (TypeError, AttributeError):
pass
else:
if n >= size:
return sorted(iterable, key=key)[:n]
# When key is none, use simpler decoration
if key is None:
it = iter(iterable)
# put the range(n) first so that zip() doesn't
# consume one too many elements from the iterator
result = [(elem, i) for i, elem in zip(range(n), it)]
if not result:
return result
_heapify_max(result)
top = result[0][0]
order = n
_heapreplace = _heapreplace_max
for elem in it:
if elem < top:
_heapreplace(result, (elem, order))
top = result[0][0]
order += 1
result.sort()
return [r[0] for r in result]
# General case, slowest method
it = iter(iterable)
result = [(key(elem), i, elem) for i, elem in zip(range(n), it)]
if not result:
return result
_heapify_max(result)
top = result[0][0]
order = n
_heapreplace = _heapreplace_max
for elem in it:
k = key(elem)
if k < top:
_heapreplace(result, (k, order, elem))
top = result[0][0]
order += 1
result.sort()
return [r[2] for r in result]
|
python
|
def nsmallest(n, iterable, key=None):
"""Find the n smallest elements in a dataset.
Equivalent to: sorted(iterable, key=key)[:n]
"""
# Short-cut for n==1 is to use min()
if n == 1:
it = iter(iterable)
sentinel = object()
if key is None:
result = min(it, default=sentinel)
else:
result = min(it, default=sentinel, key=key)
return [] if result is sentinel else [result]
# When n>=size, it's faster to use sorted()
try:
size = len(iterable)
except (TypeError, AttributeError):
pass
else:
if n >= size:
return sorted(iterable, key=key)[:n]
# When key is none, use simpler decoration
if key is None:
it = iter(iterable)
# put the range(n) first so that zip() doesn't
# consume one too many elements from the iterator
result = [(elem, i) for i, elem in zip(range(n), it)]
if not result:
return result
_heapify_max(result)
top = result[0][0]
order = n
_heapreplace = _heapreplace_max
for elem in it:
if elem < top:
_heapreplace(result, (elem, order))
top = result[0][0]
order += 1
result.sort()
return [r[0] for r in result]
# General case, slowest method
it = iter(iterable)
result = [(key(elem), i, elem) for i, elem in zip(range(n), it)]
if not result:
return result
_heapify_max(result)
top = result[0][0]
order = n
_heapreplace = _heapreplace_max
for elem in it:
k = key(elem)
if k < top:
_heapreplace(result, (k, order, elem))
top = result[0][0]
order += 1
result.sort()
return [r[2] for r in result]
|
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Find the n smallest elements in a dataset.
Equivalent to: sorted(iterable, key=key)[:n]
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/heapq3.py#L742-L803
|
train
|
Find the n smallest elements in a dataset.
|
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apache/spark
|
python/pyspark/sql/context.py
|
SQLContext.getOrCreate
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def getOrCreate(cls, sc):
"""
Get the existing SQLContext or create a new one with given SparkContext.
:param sc: SparkContext
"""
if cls._instantiatedContext is None:
jsqlContext = sc._jvm.SQLContext.getOrCreate(sc._jsc.sc())
sparkSession = SparkSession(sc, jsqlContext.sparkSession())
cls(sc, sparkSession, jsqlContext)
return cls._instantiatedContext
|
python
|
def getOrCreate(cls, sc):
"""
Get the existing SQLContext or create a new one with given SparkContext.
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if cls._instantiatedContext is None:
jsqlContext = sc._jvm.SQLContext.getOrCreate(sc._jsc.sc())
sparkSession = SparkSession(sc, jsqlContext.sparkSession())
cls(sc, sparkSession, jsqlContext)
return cls._instantiatedContext
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/sql/context.py#L103-L113
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train
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apache/spark
|
python/pyspark/serializers.py
|
ArrowStreamPandasSerializer.load_stream
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def load_stream(self, stream):
"""
Deserialize ArrowRecordBatches to an Arrow table and return as a list of pandas.Series.
"""
batches = super(ArrowStreamPandasSerializer, self).load_stream(stream)
import pyarrow as pa
for batch in batches:
yield [self.arrow_to_pandas(c) for c in pa.Table.from_batches([batch]).itercolumns()]
|
python
|
def load_stream(self, stream):
"""
Deserialize ArrowRecordBatches to an Arrow table and return as a list of pandas.Series.
"""
batches = super(ArrowStreamPandasSerializer, self).load_stream(stream)
import pyarrow as pa
for batch in batches:
yield [self.arrow_to_pandas(c) for c in pa.Table.from_batches([batch]).itercolumns()]
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618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/serializers.py#L345-L352
|
train
|
Deserialize ArrowRecordBatches to an Arrow table and return as a list of pandas. Series.
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python/pyspark/heapq3.py
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heappush
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def heappush(heap, item):
"""Push item onto heap, maintaining the heap invariant."""
heap.append(item)
_siftdown(heap, 0, len(heap)-1)
|
python
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def heappush(heap, item):
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apache/spark
|
python/pyspark/streaming/context.py
|
StreamingContext.queueStream
|
def queueStream(self, rdds, oneAtATime=True, default=None):
"""
Create an input stream from a queue of RDDs or list. In each batch,
it will process either one or all of the RDDs returned by the queue.
.. note:: Changes to the queue after the stream is created will not be recognized.
@param rdds: Queue of RDDs
@param oneAtATime: pick one rdd each time or pick all of them once.
@param default: The default rdd if no more in rdds
"""
if default and not isinstance(default, RDD):
default = self._sc.parallelize(default)
if not rdds and default:
rdds = [rdds]
if rdds and not isinstance(rdds[0], RDD):
rdds = [self._sc.parallelize(input) for input in rdds]
self._check_serializers(rdds)
queue = self._jvm.PythonDStream.toRDDQueue([r._jrdd for r in rdds])
if default:
default = default._reserialize(rdds[0]._jrdd_deserializer)
jdstream = self._jssc.queueStream(queue, oneAtATime, default._jrdd)
else:
jdstream = self._jssc.queueStream(queue, oneAtATime)
return DStream(jdstream, self, rdds[0]._jrdd_deserializer)
|
python
|
def queueStream(self, rdds, oneAtATime=True, default=None):
"""
Create an input stream from a queue of RDDs or list. In each batch,
it will process either one or all of the RDDs returned by the queue.
.. note:: Changes to the queue after the stream is created will not be recognized.
@param rdds: Queue of RDDs
@param oneAtATime: pick one rdd each time or pick all of them once.
@param default: The default rdd if no more in rdds
"""
if default and not isinstance(default, RDD):
default = self._sc.parallelize(default)
if not rdds and default:
rdds = [rdds]
if rdds and not isinstance(rdds[0], RDD):
rdds = [self._sc.parallelize(input) for input in rdds]
self._check_serializers(rdds)
queue = self._jvm.PythonDStream.toRDDQueue([r._jrdd for r in rdds])
if default:
default = default._reserialize(rdds[0]._jrdd_deserializer)
jdstream = self._jssc.queueStream(queue, oneAtATime, default._jrdd)
else:
jdstream = self._jssc.queueStream(queue, oneAtATime)
return DStream(jdstream, self, rdds[0]._jrdd_deserializer)
|
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618d6bff71073c8c93501ab7392c3cc579730f0b
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https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/streaming/context.py#L286-L313
|
train
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Create an input stream from a queue of RDDs or list of RDDs.
|
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apache/spark
|
python/pyspark/serializers.py
|
_hijack_namedtuple
|
def _hijack_namedtuple():
""" Hack namedtuple() to make it picklable """
# hijack only one time
if hasattr(collections.namedtuple, "__hijack"):
return
global _old_namedtuple # or it will put in closure
global _old_namedtuple_kwdefaults # or it will put in closure too
def _copy_func(f):
return types.FunctionType(f.__code__, f.__globals__, f.__name__,
f.__defaults__, f.__closure__)
def _kwdefaults(f):
# __kwdefaults__ contains the default values of keyword-only arguments which are
# introduced from Python 3. The possible cases for __kwdefaults__ in namedtuple
# are as below:
#
# - Does not exist in Python 2.
# - Returns None in <= Python 3.5.x.
# - Returns a dictionary containing the default values to the keys from Python 3.6.x
# (See https://bugs.python.org/issue25628).
kargs = getattr(f, "__kwdefaults__", None)
if kargs is None:
return {}
else:
return kargs
_old_namedtuple = _copy_func(collections.namedtuple)
_old_namedtuple_kwdefaults = _kwdefaults(collections.namedtuple)
def namedtuple(*args, **kwargs):
for k, v in _old_namedtuple_kwdefaults.items():
kwargs[k] = kwargs.get(k, v)
cls = _old_namedtuple(*args, **kwargs)
return _hack_namedtuple(cls)
# replace namedtuple with the new one
collections.namedtuple.__globals__["_old_namedtuple_kwdefaults"] = _old_namedtuple_kwdefaults
collections.namedtuple.__globals__["_old_namedtuple"] = _old_namedtuple
collections.namedtuple.__globals__["_hack_namedtuple"] = _hack_namedtuple
collections.namedtuple.__code__ = namedtuple.__code__
collections.namedtuple.__hijack = 1
# hack the cls already generated by namedtuple.
# Those created in other modules can be pickled as normal,
# so only hack those in __main__ module
for n, o in sys.modules["__main__"].__dict__.items():
if (type(o) is type and o.__base__ is tuple
and hasattr(o, "_fields")
and "__reduce__" not in o.__dict__):
_hack_namedtuple(o)
|
python
|
def _hijack_namedtuple():
""" Hack namedtuple() to make it picklable """
# hijack only one time
if hasattr(collections.namedtuple, "__hijack"):
return
global _old_namedtuple # or it will put in closure
global _old_namedtuple_kwdefaults # or it will put in closure too
def _copy_func(f):
return types.FunctionType(f.__code__, f.__globals__, f.__name__,
f.__defaults__, f.__closure__)
def _kwdefaults(f):
# __kwdefaults__ contains the default values of keyword-only arguments which are
# introduced from Python 3. The possible cases for __kwdefaults__ in namedtuple
# are as below:
#
# - Does not exist in Python 2.
# - Returns None in <= Python 3.5.x.
# - Returns a dictionary containing the default values to the keys from Python 3.6.x
# (See https://bugs.python.org/issue25628).
kargs = getattr(f, "__kwdefaults__", None)
if kargs is None:
return {}
else:
return kargs
_old_namedtuple = _copy_func(collections.namedtuple)
_old_namedtuple_kwdefaults = _kwdefaults(collections.namedtuple)
def namedtuple(*args, **kwargs):
for k, v in _old_namedtuple_kwdefaults.items():
kwargs[k] = kwargs.get(k, v)
cls = _old_namedtuple(*args, **kwargs)
return _hack_namedtuple(cls)
# replace namedtuple with the new one
collections.namedtuple.__globals__["_old_namedtuple_kwdefaults"] = _old_namedtuple_kwdefaults
collections.namedtuple.__globals__["_old_namedtuple"] = _old_namedtuple
collections.namedtuple.__globals__["_hack_namedtuple"] = _hack_namedtuple
collections.namedtuple.__code__ = namedtuple.__code__
collections.namedtuple.__hijack = 1
# hack the cls already generated by namedtuple.
# Those created in other modules can be pickled as normal,
# so only hack those in __main__ module
for n, o in sys.modules["__main__"].__dict__.items():
if (type(o) is type and o.__base__ is tuple
and hasattr(o, "_fields")
and "__reduce__" not in o.__dict__):
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|
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] |
Hack namedtuple() to make it picklable
|
[
"Hack",
"namedtuple",
"()",
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"make",
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] |
618d6bff71073c8c93501ab7392c3cc579730f0b
|
https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/serializers.py#L600-L651
|
train
|
Hijacks a namedtuple function to make it picklable
|
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