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Async & concurrency

Async I/O, promises, coroutines and reactive streams. 89 packages across 8 ecosystems.

PyanyioHigh-level concurrency and networking framework on top of asyncio or Trio4.16.0Nov 1, 2026MITPyhttpxThe next generation HTTP client.0.28.1Dec 6, 2024BSD-3-ClausePyaiohttpAsync http client/server framework (asyncio)3.14.5Oct 11, 2026Apache-2.0Pyaiosignalaiosignal: a list of registered asynchronous callbacks1.4.0Jul 3, 2025Apache-2.0PysniffioSniff out which async library your code is running under1.3.1Feb 25, 2024MITPygreenletLightweight in-process concurrent programming3.5.6Sep 14, 2026MITPyuvloopFast implementation of asyncio event loop on top of libuv0.23.0Oct 1, 2026MITPypytest-asyncioPytest support for asyncio1.4.1Oct 25, 2026Apache-2.0PywatchfilesSimple, modern and high performance file watching and code reload in python.1.3.0Sep 21, 2026MITPydnspythonDNS toolkit2.9.1Oct 29, 2026ISCPyjoblibLightweight pipelining with Python functions1.6.0Aug 31, 2026BSD-3-ClausePytornadoTornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.6.6Oct 21, 2026Apache-2.0PyaiofilesFile support for asyncio.25.1.0Oct 9, 2025Apache-2.0Pyasync-timeoutTimeout context manager for asyncio programs5.0.1Nov 6, 2024Apache-2.0Pynest-asyncioPatch asyncio to allow nested event loops1.6.0Jan 21, 2024BSD-3-ClausePyaiosqliteasyncio bridge to the standard sqlite3 module0.22.1Dec 23, 2025MITPyvinePython promises.5.1.0Nov 5, 2023BSD-3-ClausePyaiosmtplibasyncio SMTP client5.1.3Sep 8, 2026MITPyasyncioDeprecated backport of asyncio; use the stdlib package instead4.0.0Aug 5, 2025Apache-2.0PyaioresponsesMock out requests made by ClientSession from aiohttp package0.7.9Jun 23, 2026MIT