amaliujia commented on code in PR #38488:
URL: https://github.com/apache/spark/pull/38488#discussion_r1013486011
##########
python/pyspark/sql/connect/dataframe.py:
##########
@@ -211,14 +212,66 @@ def filter(self, condition: Expression) -> "DataFrame":
plan.Filter(child=self._plan, filter=condition),
session=self._session
)
- def first(self) -> Optional["pandas.DataFrame"]:
- return self.head(1)
+ def first(self) -> Optional[Row]:
+ """Returns the first row as a :class:`Row`.
+
+ .. versionadded:: 3.4.0
+
+ Returns
+ -------
+ :class:`Row`
+ First row if :class:`DataFrame` is not empty, otherwise ``None``.
+ """
+ return self.head()
Review Comment:
This is implementation details though but updated to `self.head(1)`.
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