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6 changes: 6 additions & 0 deletions docs/apache-airflow/howto/timetable.rst
Original file line number Diff line number Diff line change
Expand Up @@ -251,6 +251,12 @@ When the DAG is being serialized, ``serialize`` is called to obtain a
JSON-serializable value. That value is passed to ``deserialize`` when the
serialized DAG is accessed by the scheduler to reconstruct the timetable.

Note: If you are using a python version older than 3.9 you will need to add this
to your timetable file to be able to use dict instead of Dict:

.. code-block:: python
from __future__ import annotations


Timetable Display in UI
-----------------------
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