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jwc20 · jwc20 · commit e52b1de867a3 · 2024-03-18T20:27:42.000+09:00
diff --git a/01-data-model/frenchdeck.py b/01-data-model/frenchdeck.py
@@ -1,17 +1,50 @@
 import collections
+from pprintpp import pprint as pprint
+
+Card = collections.namedtuple("Card", ["rank", "suit"])
 
-Card = collections.namedtuple('Card', ['rank', 'suit'])
 
 class FrenchDeck:
-    ranks = [str(n) for n in range(2, 11)] + list('JQKA')
-    suits = 'spades diamonds clubs hearts'.split()
+    ranks = [str(n) for n in range(2, 11)] + list("JQKA") 
+    # => ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A']
+    
+    suits = "spades diamonds clubs hearts".split()
+    # => ['spades', 'diamonds', 'clubs', 'hearts']
 
     def __init__(self):
-        self._cards = [Card(rank, suit) for suit in self.suits
-                                        for rank in self.ranks]
+        self._cards = [Card(rank, suit) for suit in self.suits for rank in self.ranks]
+        # => [Card(rank='2', suit='spades'), Card(rank='3', suit='spades'), ...]
 
     def __len__(self):
         return len(self._cards)
 
     def __getitem__(self, position):
         return self._cards[position]
+
+
+
+if __name__ == "__main__":
+    beer_card = Card("7", "diamonds")
+    pprint(beer_card) # => Card(rank='7', suit='diamonds')
+    print()
+
+    deck = FrenchDeck()
+
+    pprint(len(deck)) # => 52
+    print()
+
+    pprint(deck[0]) # => Card(rank='2', suit='spades')
+    print()
+
+    pprint(deck[-1]) # => Card(rank='A', suit='hearts')
+    print()
+
+    pprint(deck[:3]) # => [Card(rank='2', suit='spades'), Card(rank='3', suit='spades'), Card(rank='4', suit='spades')]
+    print()
+
+    pprint(deck[12::13]) # => [Card(rank='A', suit='spades'), Card(rank='A', suit='diamonds'), Card(rank='A', suit='clubs'), Card(rank='A', suit='hearts')]
+    # note that the 12::13 is a slice, and it means start at 12, and take every 13th card
+    print()
+
+    # for card in deck:
+    #     print(card)
