[PySide] Application.type doesn't exist in PySide2 anymore

Alexandru Croitor alexandru.croitor at qt.io
Sun Mar 18 18:32:40 CET 2018


There's no direct equivalent of qobject_cast in PySide2 afaik.

Perhaps you can use the qApp macro, something like:

 from PySide2.QtWidgets import QApplication

 from PySide2 import QtCore

 app = QApplication([])

 if isinstance(QtCore.qApp, QApplication):


or alternatively type(QtCore.qApp).__name__ and then a string compare, which avoids importing.

Or some variation of the above.

Note you might stumble on https://bugreports.qt.io/browse/PYSIDE-585 due to qApp usage.

From: PySide <pyside-bounces+alexandru.croitor=qt.io at qt-project.org> on behalf of Frank Rueter | OHUfx <frank at ohufx.com>
Sent: Sunday, March 18, 2018 12:44:15 AM
To: pyside at qt-project.org
Subject: Re: [PySide] Application.type doesn't exist in PySide2 anymore

I am finally getting back to this now.
I can't find qobject_cast anywhere. I can only find the C++ example<http://doc.qt.io/qt-5/qobject.html#qobject_cast> which confuses me a bit though.
Could somebody share an example how to check the application type in PySide2 please?


On 11/12/17 12:20 PM, Frank Rueter | OHUfx wrote:
great, thank you, I will look into this...

On 11/12/17 10:58 AM, Alexey Vihorev wrote:


·         QCoreApplication::Type and QApplication::type() are removed. These Qt 3 legacy application types did not match the application types available in Qt 5. Use qobject_cast instead to dynamically find out the exact application type.

От: Frank Rueter | OHUfx<mailto:frank at ohufx.com>
Отправлено: 10 декабря 2017 г. в 23:53
Кому: pyside at qt-project.org<mailto:pyside at qt-project.org>
Тема: [PySide] Application.type doesn't exist in PySide2 anymore

And another PySide2 migration question:
I used to do this to check id an app is run in GUI or command line mode:
if QtWidgets.QApplication.type() == QtWidgets.QApplication.Type.GuiClient:

However QtWidgets.QApplication.type() doesn't exist in PySdie2 anymore.
What's the best way to achieve the same goal?



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