PigLatin.py

#!/usr/bin/env python2.7

def pig_latin(message):
    vowel = ["a", "e", "i", "o", "u"]
    message = message.lower().split(" ")
    for word in range(len(message)):
        if message[word][0] in vowel:
            message[word] = message[word] + "way"
        else:
            i = 1
            try:
                while not message[word][i] in vowel:
                    i += 1
            except IndexError:
                i = 0
            message[word] = message[word][i:] + message[word][:i] + "ay"
    return " ".join(message)

def main():
    from sys import argv

    if len(argv) < 2:
        while True:
            inpt = raw_input("Pig Latin: ")
            if inpt.lower() == "exit":
                raise SystemExit
            print pig_latin(inpt)

    print pig_latin(" ".join(argv[1:]))

if __name__ == "__main__":
    main()