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bpo-39765: Document caveats for asyncio add_signal_handler() #18664

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bpo-39765: Document caveats for asyncio add_signal_handler() #18664

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1c80bbf
Add caveats to add_signal_handler()
rogerdahl Feb 26, 2020
edf170d
Merge pull request #1 from rogerdahl/add-signal-handler-info
rogerdahl Feb 26, 2020
43c1066
Remove trailing whitespace
rogerdahl Feb 26, 2020
ce10bb5
Improve wording
rogerdahl Feb 28, 2020
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Remove whitespace
rogerdahl Feb 29, 2020
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8 changes: 8 additions & 0 deletions Doc/library/asyncio-eventloop.rst
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Expand Up @@ -1047,6 +1047,14 @@ Unix signals
Like :func:`signal.signal`, this function must be invoked in the main
thread.

While signal handlers registered using :func:`signal.signal` will typically be
called without significant delays as seen from the perspective of an
interactive user, signal callbacks in asyncio are subject to additional
delays while waiting for other work in the given event loop to be completed.

Any event handler set for the same signal via :func:`signal.signal` is
implicitly removed by this method.

.. method:: loop.remove_signal_handler(sig)

Remove the handler for the *sig* signal.
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