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wait-for-process-in-async-function (ASYNC222)#

Derived from the flake8-async linter.

What it does#

Checks that async functions do not wait on processes with blocking methods.

Why is this bad?#

Blocking an async function via a blocking call will block the entire event loop, preventing it from executing other tasks while waiting for the call to complete, negating the benefits of asynchronous programming.

Instead of making a blocking call, use an equivalent asynchronous library or function.


async def foo():

Use instead:

def wait_for_process():

async def foo():
    await asyncio.loop.run_in_executor(None, wait_for_process)