print_csv_field.py

import csv

import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--field', help='field number to output')
parser.add_argument('--filename', help='filename to parse')
args = parser.parse_args()

with open(args.filename) as csvfile:
    fields = csv.reader(csvfile)
    for row in fields:
        print(row[int(args.field)])