langchain-ai/langchain
The agent engineering platform.
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The agent engineering platform.
Build resilient agents.
How Python does AI. Agents, realtime voice, image generation, embeddings. Every model, every interface, typed end to end.
SQL databases in Python, designed for simplicity, compatibility, and robustness.
Data validation using Python type hints
FastAPI framework, high performance, easy to learn, fast to code, ready for production
Generate Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON/YAML/CSV.
AI辅助长篇小说创作，卡片式创作，支持基于 JSON Schema的结构化 AI 生成与上下文引用，可扩展性强。
Settings management using pydantic
🪢 Langfuse Python SDK
Open-source, self-hosted Claude Code - a terminal AI assistant and the Python framework behind it. Tool-calling, sandboxed execution, multi-agent teams, skills, checkpoints, unlimited context - on Pydantic AI, any model.
Light, flexible and extensible ASGI framework | Built to scale
Vizro is a low-code toolkit for building high-quality data visualization apps.
💨 Fast, Async-ready, Openapi, type hints based framework for building APIs
The Context Layer for unstructured data: typed, versioned datasets over S3, GCS, Azure
Agent traces you can run, not just read.
Stripe-like API versioning in FastAPI
FastCRUD is a Python package for FastAPI, offering robust async CRUD operations and flexible endpoint creation utilities.
Simple and powerful factories for mock data generation
Production-shaped MLOps Python package and reference implementation of the MLOps Coding Course: MLflow, scikit-learn, Pydantic, Pandera, uv, and mise.
AI observability platform for production LLM and agent systems.
Minimal effort CLIs derived from type hints and parse from command line, config files and environment variables
pydantic-resolve is a progressive data assembly framework which follows the stye of clean architecture
Fast iterable JSON parser.
A universal converter for singing voice projects which is cross-platform and multi-lingual
The perfect ORM to work with complex databases
Self-hosted family office engine: typed Python calculators, a private SQLite ledger, and specialist agents for Claude Code and Codex. Agents propose. Typed code computes.
MessagePack serialization library for Python derived from orjson, written in Rust using PyO3
python async orm with fastapi in mind and pydantic validation
🪄 Turns your machine learning code into microservices with web API, interactive GUI, and more.
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