Why this code Generates an error only on Sololearn?

Question

When I run it in pydroid3 or any other compiler It does not cause any error and works correctly. You can copy the code and try it in pydroid3 or another code editor
https://code.sololearn.com/cPDWuYOhJ3n1/?ref=app

Answer 1

Because Sololearn does not support Tkinter

Answer 2

Tkinter is a GUI library that turtle is based on. The sololearn code playground does not support GUIs.

Answer 3

Alexey Kopyshev what is the Tkinter ? first time i hear it. Can you explain that ,please?