langchain==0.0.195 PyPDF2==3.0.1 python-dotenv==1.0.0 streamlit==1.18.1 faiss-cpu==1.7.4 streamlit-extras altair<5 pdfminer.six==20221105 numpy keras==2.12.0 tensorflow==2.12.0 joblib openai huggingface_hub InstructorEmbedding torch sentence_transformers