blocking-os-call-in-async-function (ASYNC102)

Derived from the flake8-async linter.

What it does

Checks that async functions do not contain calls to blocking synchronous process calls via the os module.

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.

Example

async def foo():
    os.popen()

Use instead:

def foo():
    os.popen()