Overriding QThread.run and calling the default implementation

John Ehresman jpe at wingware.com
Sun Jul 4 20:12:31 BST 2021

This rings a bell —I think this was fixed in Dec 2019, though I don’t remember what version it was fixed in. The problem was how the Python GIL was being handled. I don’t think there was a workaround other than not to override run.


> On Jul 3, 2021, at 7:50 PM, Maurizio Berti <maurizio.berti at gmail.com> wrote:
> Il giorno dom 4 lug 2021 alle ore 01:36 Jeremy Katz <jkatz at volexity.com> ha scritto:
> On Fedora 32 using Python 3.8.6, the attached test works for me with
> PyQt/Qt 5.15.2 and fails to service either event loop with 5.12.10.
> [...] 
> The nearly identical C++ version works with both Qt 5.15.3 and 5.12.10.
> This seems to be an issue within PyQt that has been resolved in newer
> versions.
> Thank you so much for your input.
> Unfortunately I cannot test it with a newer version (I seriously need to update my base system), but I'm trusting your tests.
> It could be interesting to know the whole background about this, though (Phil, if you can, I'd be glad!).
> My low-level programming knowledge is very limited, so, to my eyes, a simple override of run() that calls the default method shouldn't change anything.
> But I know that we're talking about a binding (PyQt) *and* a wrapper (QThread), so, many things I'd take for "granted" could happen under the hood.
> Thanks again,
> Maurizio
> -- 
> È difficile avere una convinzione precisa quando si parla delle ragioni del cuore. - "Sostiene Pereira", Antonio Tabucchi
> http://www.jidesk.net

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