PyQt6.uic Unknown Qt widget: QOpenGLWidget

[John Thornton]

I have a simple ui file with just an QOpenGLWidget, when I try and run 
the file I get this error.

Traceback (most recent call last):
   File "/home/john/github/pyqt6/QOpenGLWidget/./oglw6-10.py", line 18, 
in <module>
     gui = main()
           ^^^^^^
   File "/home/john/github/pyqt6/QOpenGLWidget/./oglw6-10.py", line 12, 
in __init__
     uic.loadUi('oglw6-10.ui', self)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/load_ui.py", line 86, 
in loadUi
     return DynamicUILoader(package).loadUi(uifile, baseinstance)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/usr/lib/python3/dist-packages/PyQt6/uic/Loader/loader.py", 
line 62, in loadUi
     return self.parse(filename)
            ^^^^^^^^^^^^^^^^^^^^
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
1014, in parse
     self._handle_widget(ui_file.widget)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
842, in _handle_widget
     self.traverseWidgetTree(el)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
818, in traverseWidgetTree
     handler(self, child)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
280, in createWidget
     self.traverseWidgetTree(elem)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
818, in traverseWidgetTree
     handler(self, child)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
512, in createLayout
     self.traverseWidgetTree(elem)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
818, in traverseWidgetTree
     handler(self, child)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
555, in handleItem
     self.traverseWidgetTree(elem)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
818, in traverseWidgetTree
     handler(self, child)
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
271, in createWidget
     self.stack.push(self._setupObject(widget_class, parent, elem))
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/usr/lib/python3/dist-packages/PyQt6/uic/uiparser.py", line 
233, in _setupObject
     obj = self.factory.createQtObject(class_name, object_name,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/usr/lib/python3/dist-packages/PyQt6/uic/objcreator.py", line 
117, in createQtObject
     raise NoSuchWidgetError(ctor_name)
PyQt6.uic.exceptions.NoSuchWidgetError: Unknown Qt widget: QOpenGLWidget

I grepped for QOpenGLWidget in /usr/lib/python3/dist-packages/PyQt6/uic 
and found it in

john at cave:/usr/lib/python3/dist-packages/PyQt6/uic$ grep -irn 
'QOpenGLWidget' *
grep: Compiler/__pycache__/qtproxies.cpython-311.pyc: binary file matches
Compiler/qtproxies.py:302:        "QLineEdit", "QMainWindow", 
"QMenuBar", "QOpenGLWidget",

Checking PyQt5 (which works) I find on a slightly different line

john at cave:/usr/lib/python3/dist-packages/PyQt5/uic$ grep -irn 
'QOpenGLWidget' *
grep: Compiler/__pycache__/qtproxies.cpython-311.pyc: binary file matches
Compiler/qtproxies.py:289:        "QLineEdit", "QMainWindow", 
"QMenuBar", "QOpenGLWidget",

I'm running

john at cave:~$ uname -a
Linux cave 6.1.0-10-rt-amd64 #1 SMP PREEMPT_RT Debian 6.1.38-1 
(2023-07-14) x86_64 GNU/Linux

and PyQt is installed from Debian

Thanks

JT