Author vstinner
Recipients vstinner
Date 2020-09-04.10:03:39
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Message-id <1599213819.47.0.595110113151.issue41713@roundup.psfhosted.org>
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The signal module is really special. In Python, only the main thread of the main interpreter is supposed to be allowed to run Python signal handlers (but the C signal handler can be executed by any thread).

The exec function of the _signal module runs actions each time a new instance of the _signal module is created, whereas some actions must only be done exactly once:

* modify Handlers[i].tripped
* modify Handlers[i].func
* Set SIGINT signal handler
* Initialize sigint_event event (Windows only): see bpo-41686

For example, calling signal.signal() in a subinterpreter raises ValueError("signal only works in main thread of the main interpreter").
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Date User Action Args
2020-09-04 10:03:39vstinnersetrecipients: + vstinner
2020-09-04 10:03:39vstinnersetmessageid: <1599213819.47.0.595110113151.issue41713@roundup.psfhosted.org>
2020-09-04 10:03:39vstinnerlinkissue41713 messages
2020-09-04 10:03:39vstinnercreate