pandas drop duplicates

1df[(~df.duplicated()) | (df['col'].isnull())]
2

1import pandas as pd 
2  
3# making data frame from csv file 
4data = pd.read_csv("employees.csv") 
5  
6# sorting by first name 
7data.sort_values("First Name", inplace = True) 
8  
9# dropping ALL duplicte values 
10data.drop_duplicates(subset ="First Name",keep = False, inplace = True) 
11  
12# displaying data 
13print(data)

1df = df.drop_duplicates()

1df = df.loc[:,~df.columns.duplicated()]

1df3 = df3[~df3.index.duplicated(keep='first')]
2

1df = df.drop_duplicates(subset = ["b"])