Source code for airflow.providers.papermill.example_dags.example_papermill

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"""
This DAG will use Papermill to run the notebook "hello_world", based on the execution date
it will create an output notebook "out-<date>". All fields, including the keys in the parameters, are
templated.
"""
import os
from datetime import timedelta

import scrapbook as sb

from airflow import DAG
from airflow.lineage import AUTO
from airflow.operators.python import PythonOperator
from airflow.providers.papermill.operators.papermill import PapermillOperator
from airflow.utils.dates import days_ago

with DAG(
    dag_id='example_papermill_operator',
    schedule_interval='0 0 * * *',
    start_date=days_ago(2),
    dagrun_timeout=timedelta(minutes=60),
    tags=['example'],
) as dag_1:
    # [START howto_operator_papermill]
    run_this = PapermillOperator(
        task_id="run_example_notebook",
        input_nb="/tmp/hello_world.ipynb",
        output_nb="/tmp/out-{{ execution_date }}.ipynb",
        parameters={"msgs": "Ran from Airflow at {{ execution_date }}!"},
    )
    # [END howto_operator_papermill]


def check_notebook(inlets, execution_date):
    """
    Verify the message in the notebook
    """
    notebook = sb.read_notebook(inlets[0].url)
    message = notebook.scraps['message']
    print(f"Message in notebook {message} for {execution_date}")

    if message.data != f"Ran from Airflow at {execution_date}!":
        return False

    return True


with DAG(
    dag_id='example_papermill_operator_2',
    schedule_interval='0 0 * * *',
    start_date=days_ago(2),
    dagrun_timeout=timedelta(minutes=60),
) as dag_2:

    run_this = PapermillOperator(
        task_id="run_example_notebook",
        input_nb=os.path.join(os.path.dirname(os.path.realpath(__file__)), "input_notebook.ipynb"),
        output_nb="/tmp/out-{{ execution_date }}.ipynb",
        parameters={"msgs": "Ran from Airflow at {{ execution_date }}!"},
    )

    check_output = PythonOperator(task_id='check_out', python_callable=check_notebook, inlets=AUTO)

    check_output.set_upstream(run_this)