# Playing Cards 3.0
# Demonstrates inheritance - overriding methods

class Card(object):
    """ A playing card. """
    RANKS = ["A", "2", "3", "4", "5", "6", "7",
             "8", "9", "10", "J", "Q", "K"]
    SUITS = ["c", "d", "h", "s"]
    
    def __init__(self, rank, suit):
        self.rank = rank 
        self.suit = suit

    def __str__(self):
        rep = self.rank + self.suit
        return rep


class Unprintable_Card(Card):
    """ A Card that won't reveal its rank or suit when printed. """
    def __str__(self):
        return "<unprintable>"


class Positionable_Card(Card):
    """ A Card that can be face up or face down. """
    def __init__(self, rank, suit, face_up = True):
        super(Positionable_Card, self).__init__(rank, suit)
        self.is_face_up = face_up

    def __str__(self):
        if self.is_face_up:
            rep = super(Positionable_Card, self).__str__()
        else:
            rep = "XX"
        return rep

    def flip(self):
        self.is_face_up = not self.is_face_up


#main
card1 = Card("A", "c")
card2 = Unprintable_Card("A", "d")
card3 = Positionable_Card("A", "h")

print("Printing a Card object:")
print(card1)

print("\nPrinting an Unprintable_Card object:")
print(card2)

print("\nPrinting a Positionable_Card object:")
print(card3)
print("Flipping the Positionable_Card object.")
card3.flip()
print("Printing the Positionable_Card object:")
print(card3)

input("\n\nPress the enter key to exit.")