(self, operation, function)
return OriginalCommand(self, operation)
Return OriginalCommand(operation) after registering function.

        Registration adds an operation: function pair to ._operations.
        It also adds a widget function attribute that masks the tkinter
        class instance method.  Method masking operates independently
        from command dispatch.

        If a second function is registered for the same operation, the
        first function is replaced in both places.
Return OriginalCommand(operation) after registering function.
Return OriginalCommand ( operation ) after registering function .
def register(self, operation, function):
        '''Return OriginalCommand(operation) after registering function.

        Registration adds an operation: function pair to ._operations.
        It also adds a widget function attribute that masks the tkinter
        class instance method.  Method masking operates independently
        from command dispatch.

        If a second function is registered for the same operation, the
        first function is replaced in both places.
        '''
        self._operations[operation] = function
        setattr(self.widget, operation, function)
        return OriginalCommand(self, operation)
def register ( self , operation , function ) : self . _operations [ operation ] = function setattr ( self . widget , operation , function ) return OriginalCommand ( self , operation )