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  1. Qt for Python
  2. PYSIDE-1767

Pyside6/Shiboken and ABCMeta Bug

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Details

    • Bug
    • Resolution: Unresolved
    • P3: Somewhat important
    • 6.7
    • 6.2.2
    • Shiboken
    • None
    • Windows 10, Python 3.9, Pyside 6.2.2.1
    • Windows

    Description

      This is specific to the new Pyside6 package. Pyside2 does not have this issue.

      When attempting to create an abstract class combining JSON and QObject classes Shiboken throws:

      {{ c:\python\python39\lib\abc.py in _new_(mcls, name, bases, namespace, **kwargs) 104 """
      105 def _new_(mcls, name, bases, namespace, **kwargs):
      --> 106 cls = super()._new_(mcls, name, bases, namespace, **kwargs)
      107 _abc_init(cls)
      108 return cls
      TypeError: Shiboken.ObjectType._new(JsonSettingsQtMeta) is not safe, use type.new_()}}

       

      Attaching minimal examples showing the issue. Some duplicated/modified from:
      https://bugreports.qt.io/browse/PYSIDE-1051

      https://stackoverflow.com/questions/66591752/metaclass-conflict-when-trying-to-create-a-python-abstract-class-that-also-subcl

       https://github.com/sausix/python-abcmeta-workaround

      Attachments

        1. Alternate_Class_test.py
          0.5 kB
          David Fitzpatrick
        2. MirageABCMetaBug.py
          0.4 kB
          David Fitzpatrick
        3. test_pyside6_metaclass.py
          3 kB
          Axel Voitier

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-1051 Unable to call QtCore.QObject.__new__ in Python 2.7

          • 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-2746 Regression: PySide 6.7 segfaulting with metaclass and asyncio

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2202 pyside6-metaobjectdump fails on metaclass

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

            People

              ctismer Christian Tismer
              ashenwake David Fitzpatrick
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              Dates

                Created:
                Updated:

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