`airflow.timetables.simple`¶

Module Contents¶

Classes¶

`NullTimetable`	Timetable that never schedules anything.
`OnceTimetable`	Timetable that schedules the execution once as soon as possible.

class airflow.timetables.simple.NullTimetable[source]¶

Bases: _TrivialTimetable

Timetable that never schedules anything.

This corresponds to schedule_interval=None.

property summary(self) → str[source]¶

A short summary for the timetable.

This is used to display the timetable in the web UI. A cron expression timetable, for example, can use this to display the expression. The default implementation returns the timetable’s type name.

next_dagrun_info(self, *, last_automated_data_interval: Optional[airflow.timetables.base.DataInterval], restriction: airflow.timetables.base.TimeRestriction) → Optional[airflow.timetables.base.DagRunInfo][source]¶

Provide information to schedule the next DagRun.

The default implementation raises NotImplementedError.

Parameters

last_automated_data_interval – The data interval of the associated DAG’s last scheduled or backfilled run (manual runs not considered).
restriction – Restriction to apply when scheduling the DAG run. See documentation of TimeRestriction for details.

Returns

Information on when the next DagRun can be scheduled. None means a DagRun will not happen. This does not mean no more runs will be scheduled even again for this DAG; the timetable can return a DagRunInfo object when asked at another time.

class airflow.timetables.simple.OnceTimetable[source]¶