kaxil commented on issue #6549: [AIRFLOW-5880] Enforce unique task ids URL: https://github.com/apache/airflow/pull/6549#issuecomment-566285839 @Acehaidrey > To be sure, it seems we cannot enforce if two tasks that are the same operator with the same task_id are in the dag, it will fail to catch this. Is this the experience expected? No that is not true. For example, the following would raise an error: ```python from airflow.utils import timezone from airflow.operators.bash_operator import BashOperator with DAG("test_dag", start_date=timezone.datetime(2016, 1, 1)) as dag: t1 = BashOperator(task_id="t1", bash_command="true") t2 = BashOperator(task_id="t1", bash_command="false") t1 >> t2 ``` Error: ``` E airflow.exceptions.DuplicateTaskIdFound: Task id 't1' has already been added to the DAG ```
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