Gtk or Tkinter?

Question

I want to learn GUI in python but I don't know what's the best library to learn. Is it better to learn gtk, Tkinter, wxpython or something else? I want something that works for at least both Linux and Windows, looks modern and I can have much control over it.

Answer 1

Why not try Tkinter first since it's already included as module?
Also i would like to suggest Kivy framework for cross platform development including mobile.