remove from csv1 all csv2, and overwrite csv1.

exclude.py

import sys 
import pandas as pd  

if __name__ == "__main__": 
    """ 
        excluding from f1.csv all those names in f2.csv 
        and write back to f1
    """
    f1, f2 = sys.argv[1:] 
        
    df1 = pd.read_csv( f1) 
    df2 = pd.read_csv(f2) 
        
    df1 = df1[~df1.name.isin( df2) ]
        
    df1.to_csv( f1, header=True, index=False)