Wrap action command in a class : Action « Tkinker « Python Tutorial

1. Python Tutorial
2. Tkinker
3. Action

from Tkinter import *
     
class HelloCallable:
    def __init__(self):                      
        self.msg = 'Hello __call__ world' 
    def __call__(self):
        print self.msg                       
        import sys; sys.exit()               
     
widget = Button(None, text='event', command=HelloCallable())
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