python-dotenv faiss-cpu InstructorEmbedding cohere text_generation langchain==0.1.9 langchain_community==0.0.24 langchain_openai==0.0.8 PyPDF2==3.0.1 python-dotenv==1.0.1 streamlit==1.31.1 torch==2.2.1 transformers==4.31.0 sentence-transformers==2.2.2 huggingface-hub==0.14.1 altair==4 tiktoken==0.5.2 openai==1.13.3