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  1. Qt for Python
  2. PYSIDE-2453

garbage collection fails when using QtCore.Property

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: P4: Low P4: Low
    • Some future version
    • 6.x
    • PySide
    • None
    • All

      Following the example in the pyside docs, a strong reference appears to be held somewhere. when you include gc.set_debug as shown above, you can that uncollectable objects remain at cleanup. PyQt6.QtCore.pyqtProperty does not have the same issue.

      from PySide6.QtCore import QObject, Property  # this has uncollectable objects
# from PyQt6.QtCore import QObject, pyqtProperty as Property  # this works

import gc

gc.set_debug(gc.DEBUG_UNCOLLECTABLE)

class MyObject(QObject):
    @Property(int)
    def pp(self):
        pass


      gc: uncollectable <PySide6.QtCore.Property 0x000002E60CF4AE00>
gc: uncollectable <function 0x000002E61D95CDC0>
gc: uncollectable <dict 0x000002E60CF241C0>
gc: uncollectable <SourceFileLoader 0x000002E60CF0C9A0>
gc: uncollectable <module 0x000002E61E429120>
gc: uncollectable <Shiboken.ObjectType 0x000002E61DBEB9A0>
gc: uncollectable <dict 0x000002E61E426F80>
gc: uncollectable <dict 0x000002E60CF24440>
gc: uncollectable <tuple 0x000002E61E429080>
gc: uncollectable <tuple 0x000002E60CF4BF40>
gc: uncollectable <ModuleSpec 0x000002E61E420A90>
gc: uncollectable <builtin_function_or_method 0x000002E61E429170>
gc: uncollectable <builtin_function_or_method 0x000002E61E4291C0>
gc: uncollectable <builtin_function_or_method 0x000002E61E429210>
gc: uncollectable <builtin_function_or_method 0x000002E61E429260>
gc: uncollectable <builtin_function_or_method 0x000002E61E4292B0>
gc: uncollectable <builtin_function_or_method 0x000002E61E429300>
gc: uncollectable <builtin_function_or_method 0x000002E61E429350>
gc: uncollectable <builtin_function_or_method 0x000002E61E4293A0>
gc: uncollectable <builtin_function_or_method 0x000002E61E4293F0>
gc: uncollectable <builtin_function_or_method 0x000002E61E429440>
gc: uncollectable <builtin_function_or_method 0x000002E61E429490>
gc: uncollectable <builtin_function_or_method 0x000002E61E4294E0>
gc: uncollectable <builtin_function_or_method 0x000002E61E429530>
gc: uncollectable <builtin_function_or_method 0x000002E61E429580>
gc: uncollectable <builtin_function_or_method 0x000002E61E4295D0>
gc: uncollectable <builtin_function_or_method 0x000002E61E429620>
gc: uncollectable <builtin_function_or_method 0x000002E61E429670>
gc: uncollectable <builtin_function_or_method 0x000002E61E4296C0>
gc: uncollectable <PySide6.QtCore.QMetaObject 0x000002E60CF7F940>
gc: uncollectable <dict 0x000002E60CF244C0>
      [<PySide6.QtCore.Property object at 0x000002E60CF4AE00>]

        1. pyside2453.py
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            crmaurei Cristian Maureira-Fredes
            talley Talley Lambert
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              Created:
              Updated:

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