mapper.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

__author__ = 'Takahiro Ikeuchi'

import sys
import re


def main():

    line = sys.stdin.readline()
    try:
        while line:
            key, value = line.split(',')

            print key + '\t' + re.sub('\n', '', value)

            line = sys.stdin.readline()

    except "end of file":
        return None

if __name__ == "__main__":
    main()