:py:mod:`airflow.operators.latest_only`
=======================================

.. py:module:: airflow.operators.latest_only

.. autoapi-nested-parse::

   This module contains an operator to run downstream tasks only for the
   latest scheduled DagRun


Module Contents
---------------

Classes
~~~~~~~

.. autoapisummary::

   airflow.operators.latest_only.LatestOnlyOperator


.. py:class:: LatestOnlyOperator(task_id, owner = DEFAULT_OWNER, email = None, email_on_retry = conf.getboolean('email', 'default_email_on_retry', fallback=True), email_on_failure = conf.getboolean('email', 'default_email_on_failure', fallback=True), retries = DEFAULT_RETRIES, retry_delay = DEFAULT_RETRY_DELAY, retry_exponential_backoff = False, max_retry_delay = None, start_date = None, end_date = None, depends_on_past = False, ignore_first_depends_on_past = conf.getboolean('scheduler', 'ignore_first_depends_on_past_by_default'), wait_for_downstream = False, dag = None, params = None, default_args = None, priority_weight = DEFAULT_PRIORITY_WEIGHT, weight_rule = DEFAULT_WEIGHT_RULE, queue = DEFAULT_QUEUE, pool = None, pool_slots = DEFAULT_POOL_SLOTS, sla = None, execution_timeout = DEFAULT_TASK_EXECUTION_TIMEOUT, on_execute_callback = None, on_failure_callback = None, on_success_callback = None, on_retry_callback = None, pre_execute = None, post_execute = None, trigger_rule = DEFAULT_TRIGGER_RULE, resources = None, run_as_user = None, task_concurrency = None, max_active_tis_per_dag = None, executor_config = None, do_xcom_push = True, inlets = None, outlets = None, task_group = None, doc = None, doc_md = None, doc_json = None, doc_yaml = None, doc_rst = None, **kwargs)

   Bases: :py:obj:`airflow.operators.branch.BaseBranchOperator`

   Allows a workflow to skip tasks that are not running during the most
   recent schedule interval.

   If the task is run outside of the latest schedule interval (i.e. external_trigger),
   all directly downstream tasks will be skipped.

   Note that downstream tasks are never skipped if the given DAG_Run is
   marked as externally triggered.

   .. py:attribute:: ui_color
      :annotation: = #e9ffdb

      
   .. py:method:: choose_branch(self, context)

      Subclasses should implement this, running whatever logic is
      necessary to choose a branch and returning a task_id or list of
      task_ids.

      :param context: Context dictionary as passed to execute()