How is the graphical shell of the application made?

Question

Python

Let's say I know the basics of the python language, I want to write, say, a calculator. I write logic in python. And how to make a graphical shell? Let's say buttons, beautiful inputs, etc. Is it some other language or a special program? I have an understanding of how a program is developed exactly up to the moment when the writing of the program logic ends. What's next?

Answer 1

otherwise