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Binding keys to keyboard events

from Tkinter  import * class KeyDemo( Frame ):    def __init__( self ):       Frame.__init__( self )       self.pack( expand = YES, fill = BOTH )       self.master.title( "Demonstrating Keystroke Events" )       self.master.geometry( "350x50" )       self.message1 = StringVar()       self.line1 = Label( self, textvariable = self.message1 )       self.message1.set( "Type any key or shift" )       self.line1.pack()       self.message2 = StringVar()       self.line2 = Label( self, textvariable = self.message2 )       self.message2.set( "" )       self.line2.pack()       self.master.bind( "<KeyPress>", self.keyPressed )       self.master.bind( "<KeyRelease>", self.keyReleased )       self.master.bind( "<KeyPress-Shift_L>", self.shiftPressed )       self.master.bind( "<KeyRelease-Shift_L>",          self.shiftReleased )    def keyPressed( self, event ):       self.message1.set( "Key pressed: " + event.char )    def keyReleased( self, event ):       self.message1.set( "Key released: " + event.char )        def shiftPressed( self, event ):       self.message1.set( "Shift pressed" )    def shiftReleased( self, event ):       self.message1.set( "Shift released" )     KeyDemo().mainloop()