task_group

Example DAG demonstrating the usage of the TaskGroup.

Airflow Fundamentals


Providers:

Run this DAG

1. Install Astronomer CLISkip if you already have the CLI

2. Initate the project:

3. Copy and paste the code below into a file in the

dags
directory.

4. Add the following to your requirements.txt file:

5. Run the DAG:

#
# 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."""
from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator
from airflow.operators.dummy import DummyOperator
from airflow.utils.dates import days_ago
from airflow.utils.task_group import TaskGroup
# [START howto_task_group]
with DAG(dag_id="example_task_group", start_date=days_ago(2), tags=["example"]) as dag:
start = DummyOperator(task_id="start")
# [START howto_task_group_section_1]
with TaskGroup("section_1", tooltip="Tasks for section_1") as section_1:
task_1 = DummyOperator(task_id="task_1")
task_2 = BashOperator(task_id="task_2", bash_command='echo 1')
task_3 = DummyOperator(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 = DummyOperator(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 = DummyOperator(task_id="task_3")
task_4 = DummyOperator(task_id="task_4")
[task_2, task_3] >> task_4
# [END howto_task_group_inner_section_2]
# [END howto_task_group_section_2]
end = DummyOperator(task_id='end')
start >> section_1 >> section_2 >> end
# [END howto_task_group]