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# Copyright 2018 Google LLC

#

# Licensed 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

#

# https://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.

# [START composer_bashoperator_python2]

import datetime

from airflow import models

from airflow.operators import bash_operator

yesterday = datetime.datetime.combine(

datetime.datetime.today() - datetime.timedelta(1),

datetime.datetime.min.time())

default_dag_args = {

# Setting start date as yesterday starts the DAG immediately when it is

# detected in the Cloud Storage bucket.

'start_date': yesterday,

}

with models.DAG(

'composer_sample_bashoperator_python2',

schedule_interval=datetime.timedelta(days=1),

default_args=default_dag_args) as dag:

run_python2 = bash_operator.BashOperator(

task_id='run_python2',

# This example runs a Python script from the data folder to prevent

# Airflow from attempting to parse the script as a DAG.

bash_command='python2 /home/airflow/gcs/data/python2_script.py',

)

# [END composer_bashoperator_python2]