The sip extension module provides support for the PyQt5 package.

SIP is a tool that makes it very easy to create Python bindings for
C and C++ libraries. It was originally developed to create PyQt,
the Python bindings for the Qt toolkit, but can be used to create
bindings for any C or C++ library. For example, it is also used to
create wxPython, the Python bindings for the wxWidget toolkit.