For developing GUI applications in PyQt, using Qt designer is a quick and easy way to design user interfaces without writing a single line of code.

It is a Python wrapper for the Qt framework and is suitable for building cross-platform applications. In conclusion, Python provides developers with several libraries for GUI development.

Not Just for GUIs You can develop console applications using Qt, but then many of the provided classes don’t make sense. There’s even a Qt for Embedded (essentially Linux with no GUI).