ModuleNotFoundError: No module named 'PyQt4'

[kurokida]

I installed PsychoPy 3.0.6 in Mac OS 10.9.5, and I noticed a ModuleNotFoundError when I run an initial program.

The error messages are follows.

Running: /Users/jikkenyou/Desktop/USER/myName/untitled folder 2/untitled_lastrun.py
Traceback (most recent call last):
File "/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/psychopy/gui/qtgui.py", line 15, in
from PyQt4 import QtGui
ModuleNotFoundError: No module named 'PyQt4'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/jikkenyou/Desktop/USER/myName/untitled folder 2/untitled_lastrun.py", line 14, in
from psychopy import locale_setup, sound, gui, visual, core, data, event, logging, clock
File "/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/psychopy/gui/init.py", line 33, in
from .qtgui import *
File "/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/psychopy/gui/qtgui.py", line 19, in
from PyQt5 import QtWidgets
ImportError: dlopen(/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/PyQt5/QtWidgets.so, 2): Symbol not found: _LSCopyDefaultApplicationURLForURL
Referenced from: /Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/PyQt5/Qt/lib/QtCore.framework/Versions/5/QtCore
Expected in: /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
in /Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/PyQt5/Qt/lib/QtCore.framework/Versions/5/QtCore

---

PsychoPy 3.0.6 is working in Mac OS 10.13.6 and 10.14.3.
Is 10.9.5 too old?
Can I use the latest PsychoPy in the old Mac?

[peircej]

Ah. It looks like the version of PyQt we provided is too new for MacOS 10.9:
https://doc.qt.io/archives/qt-5.10/supported-platforms-and-configurations.html

In the next release I'll package PyQt 5.8 instead which should be more widely compatible.

[kurokida]

Thanks a lot!
I am waiting for the new release one.

[grudeng2]

Seeing same error on Windows 10 build 1803.

[peircej]

@grudeng2 that's stranger because the PyQt page doesn't mention any Win10 incompatibilities.
Could you go to the shell in PsychoPy's coder view and do

import PyQt5
from PyQt5 import QtWidgets
from PyQt5 import QtGui

and let me know any errors (if the first fails the other 2 are irrelevant)? Thanks

[peircej]

This is even more confusing. I've checked on a Wind10 1803 virtual box. The gui demo runs fine and the import commands above are fine, so currently I can't reproduce the issue on windows