how this pythonoperator task fail ??

[assadali007]

i run this code manually trigger i follow the code example in the picture said if no value is set it will fail i provided no value i not fail the execution is None my question how it fail ??
`dag = DAG(
dag_id='chapter4_print_context',
start_date = airflow.utils.dates.days_ago(3),
schedule_interval ="@daily"
)
def _print_context(execution_date,**context):
print(execution_date)

print_context = PythonOperator(
task_id ="print_context",
python_callable=_print_context,
dag=dag
)`

[potiuk]

I guess you are using some super-old example - days_ago should never be used in start_date, also likely in Airflow 3 context has changed - we are using logical_date for a long while. You have forgotten to mention your Airflow version, but I guess you should look at details of context and examples in the docs of Airflow you are using.