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())

DF_obj=DF_obj.drop_duplicates()

print(DF_obj)

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