Best GUI for python?

I want to create GUI applications in python.

i searched in google , it returned some results. I read this post and liked Kivy , because with it you can create cross-platform GUI applications, but i can't install it to my distro.

My os Linux Fedora 23, I tried all of the ways but whatever it didn't work, maybe I did something wrong? what can you advice? how to install Kivy or any examples? or another GUI framework?