code: def set_bind(self):
          
          IntegerEntry.set_bind(self)
          self.unbind('<Shift-Up>')
          self.unbind('<Shift-Down>')
          self.unbind('<Control-Up>')
          self.unbind('<Control-Down>')
          self.unbind('<Double-Button-1>')
          self.unbind('<Double-Button-3>')
          self.unbind('<Shift-Button-1>')
          self.unbind('<Shift-Button-3>')
          self.unbind('<Control-Button-1>')
          self.unbind('<Control-Button-3>')
  
          self.bind('<Button-1>', lambda e: self.add(1))
          self.bind('<Button-3>', lambda e: self.sub(1))
          self.bind('<Up>', lambda e: self.add(1))
          self.bind('<Down>', lambda e: self.sub(1))
          self.bind('<Enter>', self._enter)
          self.bind('<Next>', lambda e: self.set(self.allowed[0]))
          self.bind('<Prior>', lambda e: self.set(self.allowed[-1]))
docs: Sets key bindings -- we need this more than once