Which Python library to choose for GUI?

Question

Python

Which Python library can be chosen for the GUI? Needed to write a knowledge tester program in the form of theory (this is, presumably, a display of documents) and practice (a test, with question and answer options in the form of both text and images). Desirable, not very difficult to master

Answer 1

knowledge tester software

IMHO for such a client-server application is better suited. Python on the backend is quite normal.
But if you answer directly - either PyQT or wxPython.

Answer 2

The most popular are TKinter, PyQt5. It all depends on what you prefer to write code in. I advise you PyQt5, a very good thing!