如何在 Airflow 运算符中应用 Python 函数超过 Airflow XCom_pull 值

Question

I have a requirement where i need to capture XCOM response over Airflow SQLsensor operator and apply some python command to change data format.

code which i have is given below:-

delta_sql_sensor_task = SqlSensor( 
    task_id= "Verify-Completion-of-Delta-Job", 
    poke_interval= 10, 
    timeout=100,
    conn_id="lct_statedb",
    #gobal_id_list="{{ str(ti.xcom_pull(key='id_list', task_ids=['hook_task'])).replace('[','') }}",
    sql="SELECT COALESCE ( (SELECT count(*)  FROM lct_transformation_history WHERE deltaload_transformation_status is not null AND fullload_transformation_status is not null AND category='sites' AND id in (" + "{{ (ti.xcom_pull(key='id_list', task_ids=['hook_task'])) }}" + ") group by category),0) AS TRIGGER;",
    trigger_rule='one_failed',
    dag=dag)

Response which i receive from the code "{{ (ti.xcom_pull(key='id_list', task_ids=['hook_task'])).str() }}" is as ([('13',)],) but i need to change response response to '13'

Following Options which i tried are given below:-

1. I tried to store xcom_pull response in a Global variable gobal_id_list and apply Python functions but it didn't worked.
2. I also tried to apply Python operator within SQL variable as given below but no luck, code given below:- sql="SELECT COALESCE ( (SELECT count(*) FROM lct_transformation_history WHERE deltaload_transformation_status is not null AND fullload_transformation_status is not null AND category='sites' AND id in (" + "{{ str(ti.xcom_pull(key='id_list', task_ids=['hook_task'])).replace('[','').replace(']','').replace('(','').replace(')','').replace(',,','') }}" + ") group by category),0) AS TRIGGER;", .

Looking forward for valuable input. Thanks.

Answer 1

I have solved my problem with following solution, since my Xcom response was in tuple & list hence i solved through a code change given below:-

"{{ (ti.xcom_pull(key='id_list', task_ids=['hook_task'])).str()[0][0][0] }}

and it gave me desired result what i was expecting as 13 .