GUI Tk Python

from Tkinter import *
def greeting():
    print 'Hello stdout world!...'
win = Frame()  
win.pack()
Button(win, text='Hello', command=greeting).pack(side=LEFT)
Button(win, text='Quit',  command=win.quit).pack(side=RIGHT)
Label(win,  text='Hello container world').pack(side=TOP)          
win.mainloop()