[GitHub] [spark] amaliujia commented on a diff in pull request #38488: [SPARK-41002][CONNECT][PYTHON] Compatible `take`, `head` and `first` API in Python client

[GitBox <gi...@apache.org>]

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 now but updated.



-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org
For additional commands, e-mail: reviews-help@spark.apache.org