PyQt vs Qt: What are the differences?
Developers describe PyQt as "A GUI widgets toolkit". It is a set of Python v2 and v3 bindings for Qt application framework and runs on all platforms supported by Qt including Windows, OS X, Linux, iOS and Android. PyQt5 supports Qt v5. PyQt4 supports Qt v4 and will build against Qt v5. The bindings are implemented as a set of Python modules and contain over 1,000 classes. On the other hand, Qt is detailed as "A leading cross-platform application and UI framework". Qt, a leading cross-platform application and UI framework. With Qt, you can develop applications once and deploy to leading desktop, embedded & mobile targets.
PyQt and Qt can be categorized as "Cross-Platform Mobile Development" tools.