pandas.errors.DuplicateLabelError

exception pandas.errors.DuplicateLabelError

当一个操作会引入重复标签时引发的错误。

例子

>>> 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]