pandas.errors.DuplicateLabelError

exceptionpandas.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]