How to pass parameter to PythonOperator in Airflow

PythonOperator have a named parameter op_kwargs and accepts dict object.

have

t5_send_notification = PythonOperator(
    task_id='t5_send_notification',
    provide_context=True,
    python_callable=SendEmail,
    op_kwargs={"my_param":'value1'},
    dag=dag,
)

def SendEmail(my_param,**kwargs):
    print(my_param) #'value_1'
    msg = MIMEText("The pipeline for client1 is completed, please check.")
    msg['Subject'] = "xxxx"
    msg['From'] = "xxxx"
    ......
    s = smtplib.SMTP('localhost')
    s.send_me

  1. Pass a dict object to op_kwargs
  2. Use the keys to access their value from kwargs dict in your python callable

    def SendEmail(**kwargs):
        print(kwargs['key1'])
        print(kwargs['key2'])
        msg = MIMEText("The pipeline for client1 is completed, please check.")
        msg['Subject'] = "xxxx"
        msg['From'] = "xxxx"
        ......
        s = smtplib.SMTP('localhost')
        s.send_message(msg)
        s.quit()
    
    
    t5_send_notification = PythonOperator(
        task_id='t5_send_notification',
        provide_context=True,
        python_callable=SendEmail,
        op_kwargs={'key1': 'value1', 'key2': 'value2'},
        dag=dag,
    )
    

Tags:

Python

Airflow