pandas.errors.DuplicateLabelError — pandas 2.2.3 documentation (original) (raw)

exception pandas.errors.DuplicateLabelError[source]#

Error raised when an operation would introduce duplicate labels.

Examples

s = pd.Series([0, 1, 2], index=['a', 'b', 'c']).set_flags( ... allows_duplicate_labels=False ... ) s.reindex(['a', 'a', 'b']) Traceback (most recent call last): ... DuplicateLabelError: Index has duplicates. positions label a [0, 1]