Final comparison of provided and required modules

def _check_service_requirements(self):
        """Final comparison of provided and required modules"""
        missing = self.services.get_missing_services(
            self.required_services.keys()
        )
        if missing:
            self.log.critical(
                "Following services are required and missing: {}".format(
                    ', '.join(missing)
                )
            )
            return False
        return True