pandas.Index.duplicated

Index.duplicated(*args, **kwargs)[source]

Return boolean np.array denoting duplicate values

Parameters:	keep : {‘first’, ‘last’, False}, default ‘first’ first : Mark duplicates as True except for the first occurrence. last : Mark duplicates as True except for the last occurrence. False : Mark all duplicates as True. take_last : deprecated
Returns:	duplicated : np.array