human
Solve the following python programming problem given the following code:
def _dispatch_not_found(self, kwargs) : 
    '
        creates the error handling function to assign to the flask object
        with flask.register_error_handler
        ' 
    def not_found_handler(error) : 
        return (self._dispatch_rule (** kwargs), 404) 
return <MASK> 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: kwargs, self
assistant
#Here is a proper replacement for <MASK>.
def not_found_handler(