langchain ipykernel python-dotenv langchain_community langchain-community pypdf bs4 beautifulsoup4 arxiv pymupdf wikipedia langchain-text-splitters langchain-openai chromadb sentence_transformers langchain_huggingface faiss-cpu langchain_chroma langchain-chroma streamlit langchain-ollama langchain_groq langchain_core uvicorn fastapi pydantic langchain langserve uvicorn sse_starlette packaging langchain-groq pandas duckdb httpx openai duckduckgo-search langchain-google-genai google-generativeai mysql-connector-python SQLAlchemy validators==0.28.1 youtube_transcript_api pytube unstructured numexpr huggingface_hub cassio datasets tiktoken PyPDF2 gradio