Fill in The Blanks

""" Fill in The Blanks Quiz.

Asks the user for difficulty level and number of trys, and displays an approprate quiz. The quiz has numbered blanks, asks the user for their answers for each until the quiz is complete or they make the maximum number of mistakes.

Example:
    Run the following to test a compiled version provided by Udacity::

$ python tests/fill-in-the-blanks.pyc
"""

#TODO: Move global variables to __main__
quizes = {'easy':
"""The capital city of the United States of America
is ___1___. The current president of the USA is ___2___.
___2___ is best known for being the first ___3___-American
president of the USA. He has also received the
Nobel ___4___ Prize.""",
        'medium':
"""The Theory of General ___1___ was proposed by ___2___ Einstein
in 1915. It provides a unified description of ___3___ as a property
of ___4___ and ___5___, also known as ___6___, and is the current
definition of ___3___ in modern physics.""",
        'hard':
"""Spirited ___1___ is the ___2___ Award winning film by ___3___ Miyazaki
and Studio ___4___. It won Best ___5___ ___6___ Film, and also won the
Golden ___7___ at the 2002 ___8___ International Film Festival
(among many others). It was adapted by ___9___ for the English speaking
audience."""}
answers = {'easy': [['Washington, D.C.', 'Washington, DC', 'Washington DC'],
                    ['Barack Obama', 'Obama'],
                    ['African'],
                    ['Peace']],
            'medium': [['Relativity'],
                    ['Albert'],
                    ['gravity', 'gravitation'],
                    ['space'],
                    ['time'],
                    ['spacetime', 'space time']],
            'hard': [['Away'],
                    ['Academy', 'Oscar'],
                    ['Hayao'],
                    ['Ghibli'],
                    ['Animated'],
                    ['Feature'],
                    ['Bear'],
                    ['Berlin'],
                    ['Walt Disney Pictures', 'Disney']]}

alive = True
chances, difficulty = 1, 'easy'

def setdifficulty():
    """ Sets the quiz ``difficulty`` level. """
    global difficulty

print "What difficulty would you like?"
    difficulty= raw_input("Enter easy, medium, or hard:  ")
    while difficulty not in quizes:
        difficulty = raw_input("Please enter one of the options [easy, medium, hard]: ")

print "This quiz will be " + difficulty + " difficulty."
    print ""

def setchances():
    """ Sets the number of ``chances`` the player gets per question. """
    global chances

chances = raw_input("How many chances would you like per question:  ")
    while not chances.isdigit() or int(chances) < 1:
        chances = raw_input("Please enter a number that is greater than 0:  ")
    chances = int(chances)
    print ""

def checkanswer(possible, guess):
    """ Case insensitive check of answer.

Assume inputs are in the correct format, since takeQuiz() accounts
    for

Args:
        possible (list): List of possible answers for question.
        guess (string): User's guess for question.

Returns:
        bool: True if guess is in possible, False otherwise.
    """
    for answer in possible:
        if guess.lower() == answer.lower():
            return True
    return False

def answerquestion(index, quiz):
    """ Gets the player's input for blank number ``index``.

Sets the global variable ``alive`` to False if the player
    has used all their chances.

Returns:
        string: Quiz updated with player's answer.
    """
    global alive
    chance = chances
    answer = answers[difficulty][index]

while chance > 0:
        guess = raw_input("What goes in ___%s___: " % str(index+1))
        if checkanswer(answer, guess):
            print "Correct! \n"
            print '-' * 20
            quiz = quiz.replace('___%s___' % str(index+1), guess)
            print quiz
            print '-' * 20 + '\n'
            break
        elif chance > 1:
            print "That is incorrect. Try again."
            chance += -1
            print chance, "chance(s) left. \n"
        else:
            alive = False
            break
    return quiz

def takequiz():
    """ Shows the quiz and asks the user for answers.

Returns:
        bool: True if the user completes the quiz, ``False`` if they use
        too many guesses.
    """
    global alive
    alive = True

print '\n' + "* " * 10
    print "Welcome to the quiz.\n"
    setdifficulty()
    quiz = quizes[difficulty]
    setchances()

print "Let's get started:"
    print "=" * 20
    print quiz
    print "=" * 20 + '\n'

for index in xrange(len(answers[difficulty])):
        quiz = answerquestion(index, quiz)
        if not alive: break

if alive:
        print "Great job completing the %s quiz!\n" % difficulty
    else:
        print "Too many wrong guesses. Game over.\n"

return alive

if __name__ == '__main__':
    ## Test functions
    assert checkanswer(answers['easy'][0], 'washington dc') == True
    assert checkanswer(answers['easy'][0], 'washington') == False
    assert checkanswer(answers['medium'][5], 'space time') == True
    assert checkanswer(answers['medium'][3], 'time') == False
    assert checkanswer(answers['hard'][1], 'OSCAR') == True

# Main
    while True:
        takequiz()

if raw_input("Would you like to play again: (yes or no)  ") not in ['yes', 'y']:
            print "Okay, good bye. \n"
            break