More consistent way to get suit value and suits length

[ricefryegg]

Change from using different way to get suit value than rank_value

suit_values = dict(spades=3, hearts=2, diamonds=1, clubs=0)

def spades_high(card):
    rank_value = FrenchDeck.ranks.index(card.rank)
    return rank_value * len(suit_values) + suit_values[card.suit]

To be more consistent. Also we can get suit_values from existing class variable FrenchDeck.suits.

def spades_high(card):
    rank_value = FrenchDeck.ranks.index(card.rank)
    suit_value = FrenchDeck.suits.index(card.suit)
    return rank_value * len(FrenchDeck.suits) + suit_value

[Florimond]

Also, I may need glasses, but in the listing page 5, the order of the suits is not the same as the order in suit_values on page 7.

[ramalho]

@ricefryegg thanks for your suggestion. The order of the suits is intentionally different, that's why we can't reuse the class attribute as you suggested.