Python Qt6 known as PyQt6 is a binding of the cross-platform GUI toolkit Qt, implemented as a Python plug-in with Qt 6 the latest version of Qt.
The PyQt6 first stable release was on 6 January 2021, developed by Riverbank Computing Ltd and the last release was on 2 December 2021 with the version PyQt v6.2.2.
This release is license GPL or commercial on Python 3 platform.
Let's see some differences between PyQt5 and PyQt6.
The .exec() method is used in Qt to start the event loop of your QApplication or dialog boxes. In Python 2.7 exec was a keyword and Python 3 removed the exec keyword.
The first difference as a result of PyQt6 .exec() calls are named just as in Qt.
If you read the documentation from the official webpage, then in your PyQt6 source code you need to use these changes:
QEvent.Type.MouseButtonPress
...
Qt.MouseButtons.RightButton
...Both PyQt5 and PyQt6, although seemingly easy to use for complex applications, will require extra effort.