PyQt5 is a GUI widgets toolkit. It is a Python interface for Qt, one of the most powerful, and popular cross-platform GUI library. PyQt5 API is a set of modules containing a large number of classes and functions like QtCore, QtGui , QtXml, QtSvg, QtSql etc., PyQt5 has over 620 classes and 6000 functions.
PyQt5 is a multi platform toolkit which runs on all major Operating Systems like Windows, Unix, Mac, etc.,
If you are looking to learn Python GUI programming and specifically QT and PYQT5 then this is the course for you.