asyncio Asynchronous I/O

See also

• https://docs.python.org/3/library/asyncio.html

• https://github.com/python/cpython/tree/master/Lib/asyncio

• Summary: use AnyIO on top of asyncio for the best of both worlds

• https://docs.python.org/3/library/asyncio-task.html

• https://docs.python.org/3/library/asyncio-stream.html

• https://docs.python.org/3/library/asyncio-sync.html

• https://docs.python.org/3/library/asyncio-subprocess.html

• https://docs.python.org/3/library/asyncio-queue.html

• https://docs.python.org/3/library/asyncio-exceptions.html

• https://docs.python.org/3/library/asyncio-api-index.html

• https://github.com/timofurrer/awesome-asyncio

Description

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:

• run Python coroutines concurrently and have full control over their execution;

• perform network IO and IPC;

• control subprocesses;

• distribute tasks via queues;

• synchronize concurrent code;

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

• create and manage event loops, which provide asynchronous APIs for networking, running subprocesses, handling OS signals, etc;

• implement efficient protocols using transports;

• bridge callback-based libraries and code with async/await syntax.

. _asyncio_high_level_api:

asyncio High-level APIs

• Coroutines and Tasks

• Streams

• Synchronization Primitives

• Subprocesses

• Queues

• Exceptions

Guides and Tutorials

• High-level API Index

• Developing with asyncio

Structured concurrency with anyio

See also

• Structured Concurrency

• Summary: use AnyIO on top of asyncio for the best of both worlds

• AnyIO, a Python library providing structured concurrency primitives on top of asyncio