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pandas.Index.has_duplicates — pandas 3.0.0.dev0+2232.ga2315af1df documentation

pandas.Index.has_duplicates#
property Index.has_duplicates[source]#

Check if the Index has duplicate values.

Returns:
bool

Whether or not the Index has duplicate values.

See also

Index.is_unique

Inverse method that checks if it has unique values.

Examples

>>> idx = pd.Index([1, 5, 7, 7])
>>> idx.has_duplicates
True
>>> idx = pd.Index([1, 5, 7])
>>> idx.has_duplicates
False
>>> idx = pd.Index(["Watermelon", "Orange", "Apple", "Watermelon"]).astype(
...     "category"
... )
>>> idx.has_duplicates
True
>>> idx = pd.Index(["Orange", "Apple", "Watermelon"]).astype("category")
>>> idx.has_duplicates
False

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