Source code for airflow.example_dags.example_task_group

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

"""Example DAG demonstrating the usage of the TaskGroup."""
import pendulum

from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator
from airflow.operators.empty import EmptyOperator
from airflow.utils.task_group import TaskGroup

# [START howto_task_group]
with DAG(
    dag_id="example_task_group",
    start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
    catchup=False,
    tags=["example"],
) as dag:
[docs] start = EmptyOperator(task_id="start")
# [START howto_task_group_section_1] with TaskGroup("section_1", tooltip="Tasks for section_1") as section_1: task_1 = EmptyOperator(task_id="task_1") task_2 = BashOperator(task_id="task_2", bash_command='echo 1') task_3 = EmptyOperator(task_id="task_3") task_1 >> [task_2, task_3] # [END howto_task_group_section_1] # [START howto_task_group_section_2] with TaskGroup("section_2", tooltip="Tasks for section_2") as section_2: task_1 = EmptyOperator(task_id="task_1") # [START howto_task_group_inner_section_2] with TaskGroup("inner_section_2", tooltip="Tasks for inner_section2") as inner_section_2: task_2 = BashOperator(task_id="task_2", bash_command='echo 1') task_3 = EmptyOperator(task_id="task_3") task_4 = EmptyOperator(task_id="task_4") [task_2, task_3] >> task_4 # [END howto_task_group_inner_section_2] # [END howto_task_group_section_2] end = EmptyOperator(task_id='end') start >> section_1 >> section_2 >> end # [END howto_task_group]

Was this entry helpful?