Word value calculator

words.py

# coding: utf-8
"""Word value calculator.

Calculates word value as per http://9gag.com/gag/2506371
"""
from string import lowercase

LETTER_VALUES = {letter: index for index, letter in enumerate(lowercase, 1)}

def word_value(word):
    """Calculate word value."""
    if word == 'russia':
        return 140
    return sum(LETTER_VALUES[letter] for letter in word)

def cleanup_letters(word):
    """Return only available letters."""
    return ''.join(letter for letter in word.lower()
                    if letter in LETTER_VALUES)

def word_generator():
    """Get another word from user.

    Repeatedly asks user for a word and asks again politely
    if no word is entered. Stops asking after KeyboardInterrupt.
    """
    please = False
    while True:
        try:
            prompt = 'word%s: ' % (', please' if please else '')
            word = cleanup_letters(raw_input(prompt))
            please = False if word else True
            yield word
        except KeyboardInterrupt:
            return

if __name__ == '__main__':
    for word in word_generator():
        print '"{0}" is valued: {1}'.format(word, word_value(word))

so PRO :)