Source code for airflow.example_dags.example_branch_day_of_week_operator
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"""
Example DAG demonstrating the usage of BranchDayOfWeekOperator.
"""
from __future__ import annotations
import pendulum
from airflow import DAG
from airflow.operators.empty import EmptyOperator
from airflow.operators.weekday import BranchDayOfWeekOperator
from airflow.utils.weekday import WeekDay
with DAG(
dag_id="example_weekday_branch_operator",
start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
catchup=False,
tags=["example"],
schedule="@daily",
) as dag:
# [START howto_operator_day_of_week_branch]
[docs] empty_task_1 = EmptyOperator(task_id="branch_true")
empty_task_2 = EmptyOperator(task_id="branch_false")
empty_task_3 = EmptyOperator(task_id="branch_weekend")
empty_task_4 = EmptyOperator(task_id="branch_mid_week")
branch = BranchDayOfWeekOperator(
task_id="make_choice",
follow_task_ids_if_true="branch_true",
follow_task_ids_if_false="branch_false",
week_day="Monday",
)
branch_weekend = BranchDayOfWeekOperator(
task_id="make_weekend_choice",
follow_task_ids_if_true="branch_weekend",
follow_task_ids_if_false="branch_mid_week",
week_day={WeekDay.SATURDAY, WeekDay.SUNDAY},
)
# Run empty_task_1 if branch executes on Monday, empty_task_2 otherwise
branch >> [empty_task_1, empty_task_2]
# Run empty_task_3 if it's a weekend, empty_task_4 otherwise
empty_task_2 >> branch_weekend >> [empty_task_3, empty_task_4]
# [END howto_operator_day_of_week_branch]