Use lambda as action command : Action « Tkinker « Python Tutorial

1. Python Tutorial
2. Tkinker
3. Action

from Tkinter import *
from sys import stdout, exit                 

widget = Button(None,text='Hello event world', 
             command=(lambda: stdout.write('lambda world\n') or exit()) )

widget.pack()
widget.mainloop()

18.1.Action
	18.1.1.	Wrap a command in a function
	18.1.2.	Use lambda as action command
	18.1.3.	Wrap action command in a class
	18.1.4.	Wrap GUI design in a class: a button on a frame
	18.1.5.	Wrap GUI design in a class: layout controls and link actions
	18.1.6.	Add widgets to wrapped GUI class
	18.1.7.	Define __getattr__ for wrapped GUI class
	18.1.8.	Default press action
	18.1.9.	bind actions: key pressed