#!/usr/bin/env python3

import csv
import sys


def do_convert(in_filehandle, out_filehandle=None):
    reader = csv.reader(
        in_filehandle, delimiter="\t", quotechar=None, quoting=csv.QUOTE_NONE
    )
    writer = csv.writer(out_filehandle or sys.stdout, dialect="excel")
    for row in reader:
        writer.writerow(row)


if 1 == len(sys.argv):
    do_convert(sys.stdin)
else:
    for fn in sys.argv[1:]:
        if "-" == fn:
            do_convert(sys.stdin)
        else:
            fh = open(fn, "r")
            do_convert(fh)
            fh.close()