gistfile1.txt

#!/usr/bin/env python

import csv
import sys

r = csv.reader(sys.stdin)
max_file = 0
l = []
for line in r:
    for i in range(max_file, len(line) + 1):
        print("appending: %d" % i)
        l.append(open(str(i), 'w'))
    max_file = len(line) + 1
    for i, col in enumerate(line):
        l[i].write('%s\n' % col)