csv reader Index out of range

[buran]

you are over-complicating something simple as

import csv

infile = 'infile.csv' # file with large number of columns, dummy filednames field1, field2...field1460
outfile = 'outfile.csv' # you need just 3 out of 1460 columns field2, field10, filed25, in that order

fieldnames = ['field2', 'field10', 'field25']

with open(infile, 'r') as in_f, open(outfile, 'w', newline='') as out_f:
    rdr = csv.DictReader(in_f)
    wrtr = csv.DictWriter(out_f, fieldnames=fieldnames, extrasaction='ignore')
    wrtr.writeheader()
    for row in rdr:
        wrtr.writerow(row)