pandas.Index.is_unique

Index.is_unique

Return if the index has unique values.

Returns:

bool

See also

Index.has_duplicates

Inverse method that checks if it has duplicate values.

Examples

>>> idx = pd.Index([1, 5, 7, 7])
>>> idx.is_unique
False

>>> idx = pd.Index([1, 5, 7])
>>> idx.is_unique
True

>>> idx = pd.Index(["Watermelon", "Orange", "Apple", "Watermelon"]).astype(
...     "category"
... )
>>> idx.is_unique
False

>>> idx = pd.Index(["Orange", "Apple", "Watermelon"]).astype("category")
>>> idx.is_unique
True