Add index in big csv

index_correction.py

import csv

input_file_path = 'soccer_clean_flat.csv'
output_file_name = 'soccer_clean.csv'
f = open(input_file_path)
csv_f = csv.reader(f)

header = csv_f.next()
f2 = open(output_file_name, 'w')
f2.write('{},{},{}\n'.format(header[0], header[1], header[2]))

for r in csv_f:
    f2.write('{},{},{}\n'.format(str(int(r[0]) + 1), r[1], r[2]))



f.close()
f2.close()