Subclass user-defined button class and redefined press-handler method : Control « Tkinker « Python Tutorial

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Python Tutorial » Tkinker » Control   18. 9. 1. Subclass user-defined button class and redefined press-handler method from Tkinter import *       class HelloButton(Button):     def __init__(self, parent=None, **config):         Button.__init__(self, parent, config)         self.pack()         self.config(command=self.callback)     def callback(self):                   print 'Goodbye world...'          self.quit()       class MyButton(HelloButton):      def callback(self):               print "pressed"       MyButton(None, text='Hello subclass world').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

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