[Tutor] pyqt __del__ race conditions in subclassed form

[CMG Thrissur]

Hello,

This below given code is giving a race condition, i.e. sometimes gives 
the result as expected, sometimes gives error, sometimes just does 
nothing.  It is part of a subclassed qt form which i am using as main 
dialog.  This behaviour occurs when i close the dialog whereby ending 
the application.  what i want to achieve is that when the dialog is 
closed if any unsaved data, prompt the user.

Thanks

George


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def __del__(self):
    if self.Saved==False:
       choice = PyQt4.QtGui.QMessageBox.question(self,'Warning','Data modified. Do you want to save?',
                                                 QMessageBox.Yes | QMessageBox.No, QMessageBox.Yes)
       print(type(choice), choice)
       if choice == QMessageBox.Yes:
          self.SaveData()

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