langchain python-dotenv ipykernel langchain-community pypdf bs4 arxiv pymupdf wikipedia langchain-text-splitters langchain-openai chromadb sentence_transformers langchain_huggingface faiss-cpu langchain_chroma duckdb pandas openai langchain-groq duckduckgo_search==5.3.1b1 pymupdf arxiv wikipedia mysql-connector-python SQLAlchemy validators==0.28.1 youtube_transcript_api unstructured pytube numexpr huggingface_hub