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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def execute(self, request_object):
 """Generic executor method of all UseCases"""


        # If the request object is not valid then return a failure response
        if not request_object.is_valid:
            return ResponseFailure.build_from_invalid_request(
                request_object)

        # Try to process the request and handle any errors encountered
        try:
            return self.process_request(request_object)

        except ValidationError as err:
            return ResponseFailure.build_unprocessable_error(err.normalized_messages)

        except ObjectNotFoundError:
            return ResponseFailure.build_not_found(
                [{'identifier': 'Object with this ID does not exist.'}])

        except Exception as exc:
            logger.error(
                f'{self.__class__.__name__} execution failed due to error {exc}',
                exc_info=True)
            return ResponseFailure.build_system_error([{exc.__class__.__name__: exc}])