Xcom In Airflow !exclusive! Jun 2026

If Task A processes a file and generates a unique ID, and Task B needs that ID to perform a database lookup, they cannot simply share a variable in memory. This is the specific problem that XCom, short for cross-communication, was designed to solve. How XCom Works Under the Hood

pull_task = PythonOperator( task_id='pull_data', python_callable=pull_data ) xcom in airflow

@task def produce_data(): return "ids": [1,2,3], "source": "api" If Task A processes a file and generates

"The message is in the bottle," Mara said. "Now, we need the next task to open it." short for cross-communication