Source code for airflow.example_dags.example_branch_labels

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"""
Example DAG demonstrating the usage of labels with different branches.
"""
from __future__ import annotations

import pendulum

from airflow.models.dag import DAG
from airflow.operators.empty import EmptyOperator
from airflow.utils.edgemodifier import Label

with DAG(
    "example_branch_labels",
    schedule="@daily",
    start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
    catchup=False,
) as dag:
[docs] ingest = EmptyOperator(task_id="ingest")
analyse = EmptyOperator(task_id="analyze") check = EmptyOperator(task_id="check_integrity") describe = EmptyOperator(task_id="describe_integrity") error = EmptyOperator(task_id="email_error") save = EmptyOperator(task_id="save") report = EmptyOperator(task_id="report") ingest >> analyse >> check check >> Label("No errors") >> save >> report check >> Label("Errors found") >> describe >> error >> report

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