Extend frame class the second time : Control « Tkinker « Python Tutorial

1. Python Tutorial
2. Tkinker
3. Control

from Tkinter import *

class Hello(Frame):                     
    def __init__(self, parent=None):
        Frame.__init__(self, parent)    
        self.pack()
        self.data = 42
        self.make_widgets()             
    def make_widgets(self):
        widget = Button(self, text='Hello frame world!', command=self.message)
        widget.pack(side=LEFT)
    def message(self):
        self.data += 1
        print 'Hello frame world %s!' % self.data
     
class HelloExtender(Hello):
    def make_widgets(self):             
        Hello.make_widgets(self) 
        Button(self, text='Extend', command=self.quit).pack(side=RIGHT)
    def message(self):
        print 'hello', self.data        

HelloExtender().mainloop()

18.9.Control
	18.9.1.	Subclass user-defined button class and redefined press-handler method
	18.9.2.	Extend frame class
	18.9.3.	Add widgets to extended frame
	18.9.4.	Use extended frame class
	18.9.5.	Extend frame class the second time