text: # Instructions
  # Complete the TODOs in this DAG so that it runs once a day. Once you’ve done that, open the Airflow UI using the "Access Airflow" button. go to the Airflow UI and turn the last exercise off, then turn this exercise on. Wait a moment and refresh the UI to see Airflow automatically run your DAG.
  
  import datetime
  import logging
  
  from airflow import DAG
  from airflow.operators.python_operator import PythonOperator
  
  
  def hello_world():
      logging.info("Hello World")
  
  #
  # TODO: Add a daily `schedule_interval` argument to the following DAG
  #
  dag = DAG(
          "lesson1.exercise2",
          start_date=datetime.datetime.now() - datetime.timedelta(days=5),
          schedule_interval = '@daily')
  
  task = PythonOperator(
          task_id="hello_world_task",
          python_callable=hello_world,
          dag=dag)
  