How to know if CDockManager object is already deleted?

[mrawd]

I am trying to do a cleanup when my pySide6 application exits and I get this error when trying to see how many dock widgets are left in the dock manger:

Traceback (most recent call last):
  File "C:\pyProjects\app\mainWindow.py", line 2207, in onDestroyWidget
    dockMap = self.dockManager.dockWidgetsMap()
RuntimeError: Internal C++ object (PySide6QtAds.ads.CDockManager) already deleted.

Is there a way to know that dock manager object is already deleted?

[char101]

https://doc.qt.io/qtforpython-6/shiboken6/shibokenmodule.html#Shiboken.isValid

Normally if you hit that error, you are doing it wrong. Python with Qt does not usually need cleanup, and if you do, do it in QMainWindow.closeEvent.

Also this question is unrelated to this project. See https://doc.qt.io/qtforpython-6/shiboken6/typesystem_ownership.html

[mrawd]

Thank you! This is quite useful!