Are there third-party libraries (e.g., KDE's graphics libraries) that are only compatible with Qt(C++) and not available for Qt(Python)?

[markleo]

Hello,

The company wants to use Qt to develop desktop software because Qt can be written in both C++ and Python (PySide). However, there are two concerns:

1. How significant is the gap in execution efficiency between software developed with Qt(Python) and Qt(C++)?
2. Are there third-party libraries (e.g., KDE's graphics libraries) that are only compatible with Qt(C++) and not available for Qt(Python)?
   We know there have PyKDE, does PyKDE implement most of the UI components of KDE?

[jsulm]

@markleo

1. Qt itself is always compiled even if you use PySide. So, the only difference is the one between compiled C++ code and interpreted Python code, but that has nothing to do with Qt.
2. You should rather check which libraries you need and whether those are available in PySide. Most of the Qt libraries are available in PySide as far as I know. PyKDE is not part of Qt, you should consider ask them.

[CristianMaureira]

Just to add to point 2.

PyKDE seems to be very old and unmaintained.
But, you can write KDE Apps with Python https://develop.kde.org/docs/getting-started/python/ (using Kirigami, like the C++ apps do)