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:
- 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
OS signals, etc;
- implement efficient protocols using transports;
- bridge callback-based libraries and code with async/await syntax.
The source code for asyncio can be found in Lib/asyncio/.
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