pandas.DataFrame.duplicated

DataFrame.duplicated(subset=None, keep='first')

Return boolean Series denoting duplicate rows, optionally only considering certain columns.

Parameters:

subset : column label or sequence of labels, optional

Only consider certain columns for identifying duplicates, by default use all of the columns

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.

Returns:

duplicated : Series