PyQt5 is broken on the arm-unstable branch
On a fully updated latest plasma mobile system as of this message, pyqt5 seems to be broken. Calibre fails to run with this error:
ImportError: cannot import name 'QApplication' from 'PyQt5.Qt'
on the line "from PyQt5.Qt import QApplication"
Changing it to "from PyQt5.QtWidgets import QApplication" breaks with the message:
ImportError: /usr/lib/python3.9/site-packages/PyQt5/QtGui.abi3.so: undefined symbol: _ZTI18QOpenGLTimeMonitor, version Qt_5