My first window ( GUI ) (Basic)

#!/usr/bin/env python

#I'm using Python 2.7.6 in linux so, I use a uppercase T
#if you are using a newer version, is recommended to use a lowercase t (just in Tkinter not in Tk)

import Tkinter
windowTK = Tkinter.Tk()
windowTK.wm_title("Hey")
windowTK.minsize(height=333, width=333)
windowTK.geometry('+100+100')