uranusjr commented on code in PR #68778:
URL: https://github.com/apache/airflow/pull/68778#discussion_r3504879121


##########
airflow-core/src/airflow/partition_mappers/base.py:
##########
@@ -37,6 +38,12 @@ class PartitionMapper(ABC):
     """
 
     is_rollup: ClassVar[bool] = False
+    #: Rerun handling does not apply to a non-rollup mapper, so the base 
default
+    #: is ``RerunPolicy.NONE``. :class:`RollupMapper` sets it per instance, so 
the
+    #: scheduler can read ``mapper.rerun_policy`` uniformly without a rollup
+    #: type-check. (An instance attribute with a class default, not a 
ClassVar, so
+    #: RollupMapper can assign to it.)

Review Comment:
   What does Sphinx do with this?



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