python - 如何在 Airflow 中将参数传递给 PythonOperator

Question

我刚开始使用 Airflow，谁能告诉我如何将参数传递给 PythonOperator，如下所示:

t5_send_notification = PythonOperator(
    task_id='t5_send_notification',
    provide_context=True,
    python_callable=SendEmail,
    op_kwargs=None,
    #op_kwargs=(key1='value1', key2='value2'),
    dag=dag,
)

def SendEmail(**kwargs):
    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()

我希望能够将一些参数传递给 t5_send_notification 的可调用函数，即 SendEmail，理想情况下我想附上完整的日志和/或部分日志(基本上来自 kwargs)到要发送的电子邮件，猜测 t5_send_notification 是收集这些信息的地方。

非常感谢。

Answer 1

1. 将字典对象传递给op_kwargs

2. 使用键从您的 python 可调用对象中的 kwargs 字典访问它们的值

   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,
   )