pandas.api.extensions.ExtensionArray.duplicated#
- ExtensionArray.duplicated(keep='first')[source]#
Return boolean ndarray denoting duplicate values.
- Parameters:
- keep{‘first’, ‘last’, False}, default ‘first’
first
: Mark duplicates asTrue
except for the first occurrence.last
: Mark duplicates asTrue
except for the last occurrence.False : Mark all duplicates as
True
.
- Returns:
- ndarray[bool]
Examples
>>> pd.array([1, 1, 2, 3, 3], dtype="Int64").duplicated() array([False, True, False, False, True])