PyQt5-5.15.3 problem: "ImportError: Failed to import any qt binding"

[Phil Thompson]

On 02/03/2021 08:46, ullix wrote:
> Same result on Py3.6, Py3.7, Py3.8, Py3.9, running in a venv:
> 
> all works fine when using PyQt5-5.15.2, but after upgrading to
> PyQt5-5.15.3 it fails.
> 
> The traceback message is:
> 
> ...
>   File "/home/ullix/geigerlog/geigerlog/gsup_utils.py", line 69, in 
> <module>
>     import matplotlib.backends.backend_qt5agg
>   File
> "/home/ullix/geigerlog/vgl39/lib/python3.9/site-packages/matplotlib/backends/backend_qt5agg.py",
> line 11, in <module>
>     from .backend_qt5 import (
>   File
> "/home/ullix/geigerlog/vgl39/lib/python3.9/site-packages/matplotlib/backends/backend_qt5.py",
> line 16, in <module>
>     import matplotlib.backends.qt_editor.figureoptions as figureoptions
>   File
> "/home/ullix/geigerlog/vgl39/lib/python3.9/site-packages/matplotlib/backends/qt_editor/figureoptions.py",
> line 11, in <module>
>     from matplotlib.backends.qt_compat import QtGui
>   File
> "/home/ullix/geigerlog/vgl39/lib/python3.9/site-packages/matplotlib/backends/qt_compat.py",
> line 177, in <module>
>     raise ImportError("Failed to import any qt binding")
> ImportError: Failed to import any qt binding
> 
> 
> Does 5.15.3 have a known bug?
> 
> What does the error even mean, do I need to program differently?
> 
> Going back to 5.15.2 makes everything fine again.
> 
> ullix

Have you read this...

https://www.riverbankcomputing.com/pipermail/pyqt/2021-February/043644.html

Phil