# -*- coding: utf-8 -*-
import numpy as np
import pandas as pd
from pandas import Series, DataFrame

DF_obj = DataFrame({'column 1':[1,1,2,2,3,3,3],
                    'column 2':['a','a','b','b','c','c','c'],
                    'column 3':['A','A','B','B','C','C','C']})

print(DF_obj)

print(DF_obj.duplicated())

print(DF_obj.drop_duplicates())

print(DF_obj.drop_duplicates(['column 3']))