I started trying Kivy.
Contents
Kivy
Kivy is one of the cross-platform GUI library of python.
Kivy is a free and open source Python library for developing mobile apps and other multitouch application software with a natural user interface (NUI). It is distributed under the terms of the MIT License, and can run on Android, iOS, GNU/Linux, OS X, and Windows.
Wikipedia
Official: https://kivy.org/
Install
Kivy can be installed by pip.
$ pip install kivy
Hello, Kivy
from kivy.app import App
from kivy.uix.label import Label
class HelloKivyApp(App):
def build(self):
return Label(text="Hello, Kivy!")
if __name__ == '__main__':
HelloKivyApp().run()

Cool!!