Python script for cleaning mIRC color codes from IRC logs

stripMirc.py

#!/usr/bin/env python
"""mIRC Color Code Stripper

Removes mIRC color codes from provided files.

Usage:
    stripMirc.py <filename> [OUTPUT]

If OUTPUT is not specified, filename will be the original filename, with a _FIXED extension.
"""
import re
import sys
from docopt import docopt

if __name__ == "__main__":
    args = docopt(__doc__, version='stripMirc v1.0')


outfile = args['OUTPUT'] if args['OUTPUT'] else args['<filename>'] + '_FIXED'

#Thanks to ZeroKnight
#http://stackoverflow.com/questions/29247659/how-to-remove-all-irc-colour-codes-from-string
rex = re.compile('[\x02\x0F\x16\x1D\x1F]|\x03(\d{,2}(,\d{,2})?)?')

i_file = open(args['<filename>'], 'r')
o_file = open(outfile, 'a')

ctr = 0
for line in i_file:
    ctr+=1
    o_file.write(rex.sub('', line))

print("%s: processed" % args['<filename>'])