fastapi==0.104.1 uvicorn[standard]==0.24.0 pandas==2.1.3 httpx==0.25.1 pydantic==2.5.0 pydantic[email] python-multipart==0.0.6 langchain==0.0.350 langchain-openai==0.0.5 openai==1.3.7 python-dotenv==1.0.0