Uploaded image for project: 'Qt for Python'
  1. Qt for Python
  2. PYSIDE-1564

QObject does not support cooperative multiple inheritance

    XMLWordPrintable

Details

    • Bug
    • Resolution: Fixed
    • P2: Important
    • 6.5.0
    • 5.15.2
    • PySide
    • None
    • All
    • 559935482 (dev), 665d01d76 (dev), 0d279fef5 (6.4), 7f0897c59 (6.4), 52e388858 (dev), b2f6e1b26 (6.4), f668df2e2 (dev), 992f782db (dev), fbcf3fbaf (6.4), e8095467f (dev), 9637e7cc5 (dev), fddc822d6 (dev)

    Description

      Apparently QObject __init__ method does not call super to allow cooperative multiple inheritance as suggested in https://rhettinger.wordpress.com/2011/05/26/super-considered-super/

      The script attached allows to reproduce the problem and it works with PyQt5.

      I am not 100% sure whether this is a bug or intended behavior.

      Attachments

        1. multiple_inheritance.py
          0.4 kB
        2. pyside1564.py
          0.9 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-800 Segmentation fault on QGraphicsLineItem and QObject hybrid using super()

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-1434 can't use ABC with Pyside2

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-1991 Multiple Inheritance segfault on PyPySide

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2397 RuntimeError when instantiating a class, which inherits multiple subclasses of a Qt class, some Pythonic, some Qt ones

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-1613 Unexpected behavior with inheritance and properties

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2600 UpdateGeometry causes crash in a multiple inheritance tree where the first superclass is itself a subclass of QWidget and the second superclass is a QFrame

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2844 Multiple inheritance gives TypeError in __init__

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2506 Unable to subclass QPaintDeviceWindow

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2654 Multiple inheritance with mixin class get TypeError in __init__

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed
          resulted in

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2282 QMainWindow and multiple inheritance from QWidget

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2294 TypeError with PySide 6.5.0 for multiple inheritance of MainWindow

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2304 Class inheritance order breaks initialisation order

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed
          For Gerrit Dashboard: PYSIDE-1564
          # Subject Branch Project Status CR V
          350957,35 Implement multiple inheritance correctly, compatible version dev pyside/pyside-setup Status: MERGED +2 0
          465585,3 signature: Fix a refcount bug in SetError_Argument dev pyside/pyside-setup Status: MERGED +2 0
          465805,2 errorhandler: Improve the handling of general errors dev pyside/pyside-setup Status: ABANDONED -1 0
          465827,2 signature: Fix a refcount bug in SetError_Argument 6.4 pyside/pyside-setup Status: MERGED +2 0
          465864,2 Shiboken: Improve an error message by giving more context dev pyside/pyside-setup Status: MERGED +2 0
          465983,2 Shiboken: Improve an error message by giving more context 6.4 pyside/pyside-setup Status: MERGED +2 0
          466194,2 testing: make usesqapplication work with any library dev pyside/pyside-setup Status: MERGED +2 0
          466616,2 testing: make usesqapplication work with any library 6.4 pyside/pyside-setup Status: MERGED +2 0
          466635,8 testing: modernize UsesQApplication and remove other versions dev pyside/pyside-setup Status: MERGED +2 0
          467198,1 testing: modernize UsesQApplication and remove other versions 6.4 pyside/pyside-setup Status: ABANDONED 0 0
          467428,2 Fix test qtexttospeech_test.py to run in 6.4 dev pyside/pyside-setup Status: MERGED +2 0
          467462,2 Fix test qtexttospeech_test.py to run in 6.4 6.4 pyside/pyside-setup Status: MERGED +2 0
          467539,5 importlib: Avoid installation of metadata module dev pyside/pyside-setup Status: MERGED +2 0
          467934,1 importlib: Avoid installation of metadata module 6.4 pyside/pyside-setup Status: ABANDONED 0 0
          468236,3 libshiboken: Add cstring header on bindingmanager dev pyside/pyside-setup Status: MERGED +2 0
          470750,4 WIP: Implement Cooperative Multiple Inheritance the right way dev pyside/pyside-setup Status: ABANDONED -2 0

          Activity

            People

              ctismer Christian Tismer
              micheles Michele Sardo
              Votes:
              4 Vote for this issue
              Watchers:
              10 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: