zero323 commented on a change in pull request #34225:
URL: https://github.com/apache/spark/pull/34225#discussion_r725459921
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File path: python/pyspark/sql/dataframe.py
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@@ -2348,7 +2569,7 @@ def replace(self, to_replace, value=_NoValue,
subset=None):
raise TypeError("value argument is required when to_replace is
not a dictionary.")
# Helper functions
- def all_of(types):
+ def all_of(types: Union[Type, Tuple[Type, ...]]) ->
Callable[[Iterable], bool]:
Review comment:
This is OK, as long as we don't need `[]`. In fact, we'll have to go the
other way in the future as `typing` variants having `collections.abc`
counterpart aredeprecated in 3.9 ([PEP
585](https://www.python.org/dev/peps/pep-0585/))
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