When you use Python, what are you mainly using “with” it?... as in Django, Kivy, Flask, TKinter?

When your using Python,
What are you mainly using it for? / building?
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I’m inbetween knowing React well and Vue well. I’ve started to test out python.
I’ve recently created a React project, kinda through off my thought process of code, but I can see similarities between languages of meanings.