pdf loader change

utils.py

@@ -6,10 +6,10 @@ import faiss
 from langchain import HuggingFaceHub
 from langchain.chains import ConversationalRetrievalChain
 from langchain.chat_models import ChatOpenAI
-from langchain.document_loaders import DirectoryLoader, TextLoader, UnstructuredHTMLLoader, UnstructuredPDFLoader, UnstructuredWordDocumentLoader
+from langchain.document_loaders import DirectoryLoader, TextLoader, UnstructuredHTMLLoader, UnstructuredPDFLoader, UnstructuredWordDocumentLoader, PyPDFLoader
 from langchain.embeddings import OpenAIEmbeddings, HuggingFaceHubEmbeddings
 from langchain.memory import ConversationBufferWindowMemory
-from langchain.llms.openai import OpenAI
+from langchain.llms.openai import OpenAI, OpenAIChat
 from langchain.prompts.chat import (
     ChatPromptTemplate,
     HumanMessagePromptTemplate,
@@ -83,7 +83,7 @@ def set_model(model):
         llm = ChatOpenAI(model_name="gpt-3.5-turbo", temperature=0.5)
     elif model == "GPT-4":
         print("Loading GPT-4")
-        llm = OpenAI(model_name="gpt-4", temperature=0.1)
+        llm = OpenAI(model_name="gpt-4", temperature=1)
     elif model == "Flan UL2":
         print("Loading Flan-UL2")
         llm = HuggingFaceHub(repo_id="google/flan-ul2", model_kwargs={"temperature": 0.1, "max_new_tokens":500})
@@ -202,7 +202,7 @@ def load_documents(file_paths):
         elif file_path.endswith(".html"):
             loader = UnstructuredHTMLLoader(file_path)
         elif file_path.endswith(".pdf"):
-            loader = UnstructuredPDFLoader(file_path)
+            loader = PyPDFLoader(file_path)
         else:
             print("Unsupported file type")
             raise Exception("Unsupported file type")