vowel munger

vowels.py

#!/usr/bin/env python
# coding=utf-8

import sys, re, random

r_vowel = re.compile(r'[aeiou]')

def rand(m): 
   return random.choice(u'áéíóúâêîôûäëïöüáéíóúâêîôûäëïöüaeiou')

for line in sys.stdin: 
   line = line.decode('utf-8')
   line = r_vowel.sub(rand, line)
   sys.stdout.write(line.encode('utf-8'))