Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
All Packages
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Gunicorn
A fast, lightweight pre-fork WSGI and ASGI HTTP server for running Python web apps in production on UNIX.
websockets
Build correct, fast WebSocket servers and clients in Python with asyncio, threading, or Sans-I/O APIs.
filelock
A platform-independent file lock for Python that supports the with-statement.
aiosqlite
Async/await-friendly wrapper around Python's built-in sqlite3 module for asyncio applications.
sniffio
A tiny Python library that detects which async framework (trio, asyncio, or curio) your code is currently running under.
APScheduler
Python task scheduler with cron, interval, and one-off triggers, backed by pluggable persistent datastores for distributed job scheduling.
backoff
Python function decorators that retry calls on exceptions or bad return values, with exponential, fibonacci, or constant backoff and jitter.
gevent
Coroutine-based concurrency for Python, built on greenlets and a fast libev/libuv event loop.
aiosignal
A lightweight async callback registry that turns a mutable list of coroutine receivers into a frozen, awaitable dispatch signal.
watchfiles
Simple, modern, and fast file watching and code-reload for Python, powered by a Rust core built on the `notify` crate
Granian
A fast Rust HTTP server for Python that serves ASGI, WSGI, and RSGI applications
pyo3-async-runtimes
PyO3 bridges between Rust async runtimes and Python's asyncio
aiomysql
A pure-Python async MySQL and MariaDB driver for asyncio, built on top of PyMySQL.
billiard
A hardened fork of Python's multiprocessing library that powers Celery's worker pool with extra reliability fixes.
vine
Lightweight Python promise implementation powering Celery's async callback chains
Motor
MongoDB's official non-blocking Python driver for asyncio and Tornado applications.
grpclib
A pure-Python gRPC implementation for asyncio built on top of the hyper-h2 HTTP/2 stack.
aiocsv
Asynchronous CSV reading and writing for Python's asyncio, with a drop-in-compatible API and an optional C-accelerated parser.
Twisted
A mature, event-driven networking engine for Python built around the reactor pattern, with async HTTP, SSH, DNS, IMAP, and IRC protocols built in.
Asyncer
Small, developer-experience-focused Python library for mixing async, await, and blocking code via AnyIO.
taskiq
An async-first distributed task queue for Python with type-safe tasks, pluggable brokers, and first-class FastAPI/AioHTTP integration.
kazoo
A production-grade, higher-level Python client for Apache ZooKeeper with pluggable async handlers and battle-tested distributed recipes.
Loky
A robust, cross-platform reusable process pool executor for Python, built as the parallel backend for joblib.
aiodns
A simple asynchronous DNS resolver for Python's asyncio built on pycares
