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Improve error message for non-unique columns
Co-authored-by: William Ayd <[email protected]>
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pandas/core/frame.py

Lines changed: 1 addition & 1 deletion
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@@ -8941,7 +8941,7 @@ def explode(
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if not self.columns.is_unique:
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duplicate_cols = self.columns[self.columns.duplicated()].tolist()
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raise ValueError(
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"data frame columns must be unique. "
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"DataFrame columns must be unique. "
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+ f"Duplicate columns: {duplicate_cols}"
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)
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