Re: [PR] [WIP][SPARK-46858][PYTHON][PS][BUILD] Upgrade Pandas to 2.2.0 [spark]

["itholic (via GitHub)" <gi...@apache.org>]

itholic commented on code in PR #44881:
URL: https://github.com/apache/spark/pull/44881#discussion_r1487597019


##########
python/pyspark/pandas/frame.py:
##########
@@ -10607,7 +10607,9 @@ def melt(
                     name_like_string(name) if name is not None else "variable_{}".format(i)
                     for i, name in enumerate(self._internal.column_label_names)
                 ]
-        elif isinstance(var_name, str):
+        elif is_list_like(var_name):
+            raise ValueError(f"{var_name=} must be a scalar.")
+        else:

Review Comment:
   Fixed from: https://github.com/pandas-dev/pandas/pull/55948



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