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  * [ __ ](../../index.html)
  * [ API reference ](../index.html)
  * [ Index objects ](../indexing.html)
  * pandas.Index... 

#  pandas.Index.is_unique  #

Index.  is_unique  [ [source]  ](https://github.com/pandas-
dev/pandas/blob/v2.2.2/pandas/core/indexes/base.py#L2313-L2346) #

    

Return if the index has unique values.

Returns  :

    

bool

    

See also

[ ` Index.has_duplicates  `
](pandas.Index.has_duplicates.html#pandas.Index.has_duplicates
"pandas.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
    

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