[issue35635] asyncio.create_subprocess_exec() only works in main thread

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

By the way, asyncio doc is outdated:
"The default asyncio event loop implementation on Windows does not support subprocesses. Subprocesses are available for Windows if a ProactorEventLoop is used. See Subprocess Support on Windows for details."
https://docs.python.org/dev/library/asyncio-subprocess.html#creating-subprocesses

It's no longer true in Python 3.8:

"Changed in version 3.8: On Windows, ProactorEventLoop is now the default event loop."
https://docs.python.org/dev/library/asyncio-platforms.html

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