ImportError: cannot import name 'QActionGroup' from 'pivy.qt.QtWidgets'

[olumide-x]

As shown below, a test of my pivy build shows that some Qt classes are missing, namely QActionGroup and QAction

>>> from pivy import qt
>>> from pivy.qt import QtWidgets
>>> from pivy import coin, quarter
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/pivy/quarter/__init__.py", line 17, in <module>
    from . import QuarterWidget
  File "/usr/lib/python3/dist-packages/pivy/quarter/QuarterWidget.py", line 127, in <module>
    from .ContextMenu import ContextMenu
  File "/usr/lib/python3/dist-packages/pivy/quarter/ContextMenu.py", line 20, in <module>
    from pivy.qt.QtWidgets import QMenu, QActionGroup, QAction
ImportError: cannot import name 'QActionGroup' from 'pivy.qt.QtWidgets' (/usr/lib/python3/dist-packages/pivy/qt/QtWidgets/__init__.py)

What would be the cause of this?

[olumide-x]

Okay, I've just confirmed that this problem is from PySide

>>> from PySide6.QtWidgets import QActionGroup
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'QActionGroup' from 'PySide6.QtWidgets' (/home/Olumide/.local/lib/python3.10/site-packages/PySide6/QtWidgets.abi3.so)

[olumide-x]

Both classes now load.

In desperation I tried lots of things, the last of which was pip install --upgrade --force-reinstall PySide6 so I guess that did the trick.

Now I can run some of the tests but sadly not visual_test.py. I keep getting the error

QWidget: Must construct a QApplication before a QWidget
Aborted (core dumped)

Using pdb, I tracked the problem to the QGLWidget constructor:

$ python3 -m pdb visual_test.py 
> /home/Olumide/Downloads/src/pivy/tests/visual_test.py(1)<module>()
-> import sys
(Pdb) b /usr/lib/python3/dist-packages/pivy/quarter/QuarterWidget.py:199
Breakpoint 1 at /usr/lib/python3/dist-packages/pivy/quarter/QuarterWidget.py:199
(Pdb) r
> /usr/lib/python3/dist-packages/pivy/quarter/QuarterWidget.py(199)__init__()
-> QtOpenGL.QGLWidget.__init__(self, *args[:len(params)])
(Pdb) bt
  /usr/lib/python3.10/bdb.py(598)run()
-> exec(cmd, globals, locals)
  <string>(1)<module>()
  /home/Olumide/Downloads/src/pivy/tests/visual_test.py(29)<module>()
-> main()
  /home/Olumide/Downloads/src/pivy/tests/visual_test.py(20)main()
-> viewer = quarter.QuarterWidget()
> /usr/lib/python3/dist-packages/pivy/quarter/QuarterWidget.py(199)__init__()
-> QtOpenGL.QGLWidget.__init__(self, *args[:len(params)])

Are the tests up to date? Or is my version of Qt and PySide version 6.6.1 unsupported? I am happy to downgrade but I am not sure to which version.

[olumide-x]

I've rebuilt soqt, quarter and pivy to use QT5 but the situation is now worse :-(

>>> from pivy.qt import QtWidgets
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/pivy/__init__.py", line 30, in <module>
    from .coin import SoDB, SoNodeKit, SoInteraction
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40397, in <module>
    class SoGeo(object):
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40431, in SoGeo
    __swig_destroy__ = _coin.delete_SoGeo
AttributeError: module 'pivy._coin' has no attribute 'delete_SoGeo'
>>> from pivy import coin, quarter
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/pivy/__init__.py", line 30, in <module>
    from .coin import SoDB, SoNodeKit, SoInteraction
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40397, in <module>
    class SoGeo(object):
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40431, in SoGeo
    __swig_destroy__ = _coin.delete_SoGeo
AttributeError: module 'pivy._coin' has no attribute 'delete_SoGeo'

[looooo]

you are right, there were some changes in qt6/PySide6. QWorkspace -> QMdiArea PySide2.QtOpenGL.QGLWidget -> PySide6.QtOpenGLWidgets.QOpenGLWidget and maybe more

[olumide-x]

I'm going to rebuild all dependencies with QT6 and try the examples e.g. https://github.com/coin3d/pivy/blob/master/examples/Mentor/02.1.HelloCone.py

Update

>>> import sys
>>> 
>>> from pivy.sogui import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/pivy/__init__.py", line 30, in <module>
    from .coin import SoDB, SoNodeKit, SoInteraction
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40397, in <module>
    class SoGeo(object):
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40431, in SoGeo
    __swig_destroy__ = _coin.delete_SoGeo
AttributeError: module 'pivy._coin' has no attribute 'delete_SoGeo'
>>> from pivy.coin import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/pivy/__init__.py", line 30, in <module>
    from .coin import SoDB, SoNodeKit, SoInteraction
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40397, in <module>
    class SoGeo(object):
  File "/usr/lib/python3/dist-packages/pivy/coin.py", line 40431, in SoGeo
    __swig_destroy__ = _coin.delete_SoGeo
AttributeError: module 'pivy._coin' has no attribute 'delete_SoGeo'

Basically, the situation is much worse. I've also tried downgrading to 0.6.8 but that didn't work either. Holding out for help.