def create(self, plan_name):
        """Creates a plan to store files

        Creates a plan by creating a Swift container matching plan_name, and
        given files into it.

        :param plan_name: The name of the plan
        :type plan_name: str
        :param plan_files: names and contents of files to store
        :type plan_files: dict
        """
        if self.list() not in plan_name:
            self.swiftclient.put_container(
                plan_name,
                headers=default_container_headers
            )
        else:
            raise exception.PlanAlreadyExistsError(name=plan_name)
dataset/ETHPy150Open openstack/tripleo-common/tripleo_common/core/plan_storage.py/SwiftPlanStorageBackend.create/swapped operands of `not in`