docs-archive/apache-airflow/2.3.2/_sources/howto/operator/datetime.rst.txt

 .. 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.



.. _howto/operator:BranchDateTimeOperator:

BranchDateTimeOperator
======================

Use the :class:`~airflow.operators.datetime.BranchDateTimeOperator` to branch into one of two execution paths depending on whether the date and/or time of execution falls into the range given by two target arguments.

.. exampleinclude:: /../../airflow/example_dags/example_branch_datetime_operator.py
    :language: python
    :start-after: [START howto_branch_datetime_operator]
    :end-before: [END howto_branch_datetime_operator]

The target parameters, ``target_upper`` and ``target_lower``, can receive a ``datetime.datetime``, a ``datetime.time``, or ``None``. When a ``datetime.time`` object is used, it will be combined with the current date in order to allow comparisons with it. In the event that ``target_upper`` is set to a ``datetime.time`` that occurs before the given ``target_lower``, a day will be added to ``target_upper``. This is done to allow for time periods that span over two dates.

.. exampleinclude:: /../../airflow/example_dags/example_branch_datetime_operator.py
    :language: python
    :start-after: [START howto_branch_datetime_operator_next_day]
    :end-before: [END howto_branch_datetime_operator_next_day]

If a target parameter is set to ``None``, the operator will perform a unilateral comparison using only the non-``None`` target. Setting both ``target_upper`` and ``target_lower`` to ``None`` will raise an exception.