asyncio — Asynchronous I/O — Python 3.8.20 documentation (original) (raw)


asyncio is a library to write concurrent code using the async/await syntax.

asyncio is used as a foundation for multiple Python asynchronous frameworks that provide high-performance network and web-servers, database connection libraries, distributed task queues, etc.

asyncio is often a perfect fit for IO-bound and high-levelstructured network code.

asyncio provides a set of high-level APIs to:

Additionally, there are low-level APIs for_library and framework developers_ to:

asyncio REPL

You can experiment with an asyncio concurrent context in the REPL:

$ python -m asyncio asyncio REPL ... Use "await" directly instead of "asyncio.run()". Type "help", "copyright", "credits" or "license" for more information.

import asyncio await asyncio.sleep(10, result='hello') 'hello'

Raises an auditing event cpython.run_stdin with no arguments.

Changed in version 3.8.20: Emits audit events.

Reference

Note

The source code for asyncio can be found in Lib/asyncio/.