DataFrame.drop_duplicates()

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 : Drop duplicates except for the first occurrence.
• last : Drop duplicates except for the last occurrence.
• False : Drop all duplicates.

take_last : deprecated

inplace : boolean, default False

Whether to drop duplicates in place or to return a copy