asyncio — Asynchronous I/O


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-level structured network code.

asyncio provides a set of high-level APIs to:

Additionally, there are low-level APIs for library and framework developers to:

Availability: not WASI.

This module does not work or is not available on WebAssembly. See WebAssembly platforms for more information.

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.

Zmienione w wersji 3.12.5: (also 3.11.10, 3.10.15, 3.9.20, and 3.8.20) Emits audit events.

Zmienione w wersji 3.13: Uses PyREPL if possible, in which case PYTHONSTARTUP is also executed. Emits audit events.

Reference

Informacja

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