uranusjr commented on a change in pull request #20000:
URL: https://github.com/apache/airflow/pull/20000#discussion_r762159303
##########
File path: airflow/utils/timezone.py
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@@ -175,6 +175,16 @@ def parse(string: str, timezone=None) -> DateTime:
return pendulum.parse(string, tz=timezone or TIMEZONE, strict=False) #
type: ignore
+@overload
+def coerce_datetime(v: None) -> None:
+ ...
+
+
+@overload
+def coerce_datetime(v: Union[dt.datetime, DateTime]) -> DateTime:
+ ...
Review comment:
`pendulum.DateTime` is a stdlib `datetime` subclass, so this is
equivalent to
```suggestion
def coerce_datetime(v: dt.datetime) -> DateTime:
...
```
same goes for the original annotation; it can just be
`Optional[dt.datetime]`.
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