asyncio — Asynchronous I/O — Python 3.7.17 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:

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

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