from Tkinter import *

def greet():
   print "hello world"

win = Frame()
win.pack()

Label(win, text="Hello world").pack(side=TOP)
Button(win, text = 'hello', command=greet).pack(side=LEFT)
Button(win,text='quit',command=win.quit).pack(side=RIGHT,expand=YES,fill=X,padx=10)
Button(win, text = 'Button1').pack(side=TOP)
Button(win, text = 'Button2').pack(side=TOP)
Button(win, text = 'Button3').pack(side=TOP)
Button(win, text = 'Button4').pack(side=LEFT)
Button(win, text = 'Button4').pack(side=RIGHT)
win.mainloop()