QT GUI errors when input is added to textEdit

worldsnexthero

QT GUI now opens up successfully and lineEdit slots are filled in if programmed by python code however if I, myself, enter any value within a lineEdit slot of the GUI, the GUI exits on its own with following error:

python3.7: relocation error: /localhome/lab/FaizanEnv/lib/python3.7/site-packages/PyQt5/Qt/plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so: symbol xkb_compose_table_new_from_locale, version V_0.5.0 not defined in file libxkbcommon.so.0 with link time reference

worldsnexthero

Solution:

PyQt5 (latest version 5.15 which deb 8 installs automatically) is not compatible with libxkbcommon versions < 0.5.0. Deb 8 installs 0.4.3 version of libxkbcommon.

Rather than manually building the upgraded version of libxkbcommon ( and potentially breaking other stuff) I downgraded the PyQt5 version on debian 8 via command:

pip install pyqt5==0.5.12.3

Versions 0.5.13 and higher show the same error from original message. 0.5.12.3 is the most upgraded version without this issue.

This fixed the problem!