# packing order and sides determine layout; make parents expandable

from Tkinter import *

def greeting():
    print 'Hello stdout world!...'

win = Frame()	
win.pack(side=TOP, expand=YES, fill=BOTH)
Button(win, text='Hello', command=greeting).pack(side=LEFT, fill=Y)
Label(win,  text='Hello container world').pack(side=TOP)
Button(win, text='Quit',  command=win.quit).pack(side=RIGHT, expand=YES,fill=X)

win.mainloop()