Hangman

from random import choice

alph = 'abcdefghijklmnopqrstuvwxyz'
word = choice(['world', 'banana', 'pineapple', 'crowdfunding'])
letters = []
attempts = 5

while True:
    letter = raw_input('Enter letter: ')
    if letter in letters:
        print 'This letter was entered before'
        continue

    letters.append(letter)

    if len([c for c in letters if c in set(word)]) == len(set(word)):
        print 'Yep, the word was: %s' % word
        break

    if letter in word:
        for c in word:
            if c in letters:
                print c,
            else:
                print '_',
        print


    else:
        attempts -= 1
        if attempts == 0:
            print 'Sry, u loose'
            break
        else:
            print 'Nope, try another letter'

    print 'Unused letters: ',
    for c in alph:
        if c not in letters:
            print c,
        else:
            print '*',
    print