HyukjinKwon commented on code in PR #43019:
URL: https://github.com/apache/spark/pull/43019#discussion_r1332312402
##########
python/pyspark/sql/dataframe.py:
##########
@@ -5797,25 +5798,53 @@ def withColumnRenamed(self, existing: str, new: str) ->
"DataFrame":
Parameters
----------
existing : str
- string, name of the existing column to rename.
+ The name of the existing column to be renamed.
new : str
- string, new name of the column.
+ The new name to be assigned to the column.
Returns
-------
:class:`DataFrame`
- DataFrame with renamed column.
+ A new DataFrame with renamed column.
+
+ See Also
+ --------
+ :meth:`withColumnsRenamed`
Examples
--------
>>> df = spark.createDataFrame([(2, "Alice"), (5, "Bob")],
schema=["age", "name"])
- >>> df.withColumnRenamed('age', 'age2').show()
+
+ Example 1: Rename a single column
+
+ >>> df.withColumnRenamed("age", "age2").show()
+----+-----+
|age2| name|
+----+-----+
| 2|Alice|
| 5| Bob|
+----+-----+
+
+ Example 2: Rename a column that does not exist (no-op)
+
+ >>> df.withColumnRenamed("non_existing", "new_name").show()
+ +---+-----+
+ |age| name|
+ +---+-----+
+ | 2|Alice|
+ | 5| Bob|
+ +---+-----+
+
+ Example 3: Rename multiple columns
+
+ >>> df.withColumnRenamed("age", "age2") \\
+ ... .withColumnRenamed("name", "name2").show()
Review Comment:
actually, let's don't use `\\`. That's sort of discouraged by PEP 8., and
seems it fits within 100 characters.
```suggestion
>>> df.withColumnRenamed("age", "age2").withColumnRenamed("name",
"name2").show()
```
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