beginning implementations of CardCollection and some of its subclasses

BearOnline/cards/collections/_playingcarddeck.py

@@ -0,0 +1,9 @@
+from itertools import product, starmap
+from ._deck import Deck
+from .. import PlayingCard
+
+class PlayingCardDeck(Deck):
+    def __init__(self):
+        #initialize the deck with the product of the ranks and suits
+        super().__init__(list(starmap(PlayingCard, product(PlayingCard.ranks.keys(), PlayingCard.suits.keys()))))
+