langchain==0.0.306 PyPDF2==3.0.1 streamlit==1.25.0 torch==2.0.1 transformers==4.31.0 llama-cpp-python==0.1.76 pypdf==3.14.0 sentence-transformers==2.2.2 faiss-cpu==1.7.4 pydantic==1.10.12