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Could not find or load the Qt platform plugin "xcb" #57

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@hroncok

Když nainstaluju PyQt5 do virtuenvu pomocí wheelu, ale na systému už nějaké (jiné) Qt mám, dostávám:

This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".

Reinstalling the application may fix this problem.
Neúspěšně ukončen (SIGABRT) (core dumped [obraz paměti uložen])

Vyřešit to jde pomocí:

QT_QPA_PLATFORM_PLUGIN_PATH=__venv__/lib/python3.6/site-packages/PyQt5/Qt/plugins/platforms/ python ...

Je dobré to dát do materiálů o Qt, když se to bude dít i studentům.

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