polars.Series.is_duplicated

Series.is_duplicated() → Series

Get mask of all duplicated values.

Returns:

Boolean Series

Examples

>>> s = pl.Series("a", [1, 2, 2, 3])
>>> s.is_duplicated()
shape: (4,)
Series: 'a' [bool]
[
        false
        true
        true
        false
]