pandas.errors.DuplicateLabelError

exception pandas.errors.DuplicateLabelError

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]