There is PySide2/Qt for Python which are the official Python bindings for Qt by the Qt Company itself and they are close enough to the C++ API(since they are auto-generated) that it's possible to just use the C++ documentation and translate any C++ code into python nearly 1:1 (except things like QString where you can just use Pythons native types).

Not terribly complex, but not trivial either. Yes, there are missing pieces in non-python ones. But given that basics are handled, it's often pretty easy to add the pieces which you need.