HyukjinKwon commented on a change in pull request #34957:
URL: https://github.com/apache/spark/pull/34957#discussion_r772202657
##########
File path: python/pyspark/pandas/frame.py
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@@ -3989,9 +3989,14 @@ def insert(
)
if is_name_like_tuple(column):
- if len(column) != len(self.columns.levels):
- # To be consistent with pandas
- raise ValueError('"column" must have length equal to number of
column levels.')
+ if isinstance(self.columns, pd.MultiIndex):
Review comment:
Can we check it via `self._internal.column_labels_level > 1` to avoid
index creation?
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