text: # -*- coding: utf-8 -*-
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  from datetime import datetime
  
  from airflow.models import DAG
  from airflow.operators.bash_operator import BashOperator
  
  DEFAULT_DATE = datetime(2016, 1, 1)
  
  args = {
      'owner': 'airflow',
      'start_date': DEFAULT_DATE,
  }
  
  dag = DAG(dag_id='test_mark_success', default_args=args)
  task = BashOperator(
      task_id='task1',
      bash_command='sleep 600',
      dag=dag)
  