def delete_machine_metadata(request): """Deletes metadata for a machine, given the machine id and the tag to be deleted. """ backend_id = request.matchdict['backend'] machine_id = request.matchdict['machine'] try: tag = request.json_body['tag'] except: raise RequiredParameterMissingError('tag') user = user_from_request(request) methods.delete_machine_metadata(user, backend_id, machine_id, tag) return OK