Can you create apps using python?

Answer 1

Of course :)
Depending on what you mean by "apps" exactly, you can either build web apps with Python web frameworks (like Django), desktop apps with one of GUI-supporting libraries (kivy, tkinter, pygame and others) or mobile apps (kivy, sl4a..)
Lots of possibilities!

Answer 2

You can make them using different programming tools such as pygame (2D apps), Panda 3D (3D apps) and others.