[issue42683] asyncio should handle keyboard interrupt while the event loop is running

[Andrew Svetlov]

Andrew Svetlov  added the comment:

Duplicate for #39622

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resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> KeyboardInterrupt is ignored when await asyncio.sleep(0)

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[issue42683] asyncio should handle keyboard interrupt while the event loop is running

[Gianni Tedesco]

Change by Gianni Tedesco :


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nosy: +scaramanga

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[issue42683] asyncio should handle keyboard interrupt while the event loop is running

[Guido van Rossum]

Change by Guido van Rossum :


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nosy: +gvanrossum

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[issue42683] asyncio should handle keyboard interrupt while the event loop is running

[Paul Moore]

Change by Paul Moore :


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nosy: +njs

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[issue42683] asyncio should handle keyboard interrupt while the event loop is running

[Paul Moore]

New submission from Paul Moore :

See the comment on Discourse here: 
https://discuss.python.org/t/feeding-data-generated-via-asyncio-into-a-synchronous-main-loop/5436/28
 (and the thread leading up to this comment).

In the thread, @njs states that if the user hits Ctrl-C while the asyncio event 
loop is running, it's possible for internal asyncio data structures to end up 
in an inconsistent state. If that's the case, then this would make 
asyncio-based code unreliable in real-world use.

I don't have a way to reproduce this - from the Discourse thread, I had assumed 
that ctrl-C was safe to use on an asyncio-based program, but was told 
otherwise, and I can't find anything definitive either way.

At a minimum, the asyncio documentation should confirm that it is 
exception-safe (specifically against Ctrl-C, but in general I'd assume that 
asyncio is safe in the face of uncaught exceptions in user-written async code).

--
components: asyncio
messages: 383370
nosy: asvetlov, paul.moore, yselivanov
priority: normal
severity: normal
status: open
title: asyncio should handle keyboard interrupt while the event loop is running
type: behavior
versions: Python 3.10

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