(Python) Convert ShiftJIS to UTF-8

convert.py

#!/usr/bin/env python
# -*- coding: UTF-8 -*-

# Convert ShiftJIS to UTF-8
# Usage: cat ShiftJIS.txt | ./convert.py > UTF8.txt
# Alternative method: cat ShiftJIS.txt | iconv -f shift_jis -t utf8 > UTF8.txt

import sys
import codecs

ustdout = codecs.getwriter('utf_8')(sys.stdout)
jstdin = codecs.getreader('shift_jis')(sys.stdin)

for line in jstdin.readlines():
    ustdout.write(line)