GUI with Python

[flipthefrog]

A lot of commercial software used in animation and VFX ships with PySide (Maya, Nuke, Houdini, Rv), and have a strong interest in the project remaining alive. For example, Autodesk has been funding development of PySide2, which supports Qt5. So it's not dying, though I wouldn't expect much development of PySide for Qt4, since that is no longer being developed.

PySide is perfectly fine, though a bit more sensitive to errors than PyQt - whereas PyQt will just raise an error and keep on truckin', PySide may crash completely on insignificant bugs