[issue34679] asyncio.add_signal_handler call fails if not on main thread

[Kyle Stanley]

Kyle Stanley <aeros167 at gmail.com> added the comment:

> Skipping this call for non-main thread in proactor implementation makes sense.

How do we identify whether or not set_wakeup_fd() is being called from a non-main thread?

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nosy: +aeros167

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34679>
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