update from atlas

01-data-model/frenchdeck.doctest

@@ -0,0 +1,54 @@
+>>> from frenchdeck import FrenchDeck, Card
+>>> beer_card = Card('7', 'diamonds')
+>>> beer_card
+Card(rank='7', suit='diamonds')
+>>> deck = FrenchDeck()
+>>> len(deck)
+52
+>>> deck[:3]
+[Card(rank='2', suit='spades'), Card(rank='3', suit='spades'), Card(rank='4', suit='spades')]
+>>> deck[12::13]
+[Card(rank='A', suit='spades'), Card(rank='A', suit='diamonds'), Card(rank='A', suit='clubs'), Card(rank='A', suit='hearts')]
+>>> Card('Q', 'hearts') in deck
+True
+>>> Card('Z', 'clubs') in deck
+False
+>>> for card in deck:  # doctest: +ELLIPSIS
+...   print(card)
+Card(rank='2', suit='spades')
+Card(rank='3', suit='spades')
+Card(rank='4', suit='spades')
+...
+>>> for card in reversed(deck):  # doctest: +ELLIPSIS
+...   print(card)
+Card(rank='A', suit='hearts')
+Card(rank='K', suit='hearts')
+Card(rank='Q', suit='hearts')
+...
+>>> for n, card in enumerate(deck, 1):  # doctest: +ELLIPSIS
+...   print(n, card)
+1 Card(rank='2', suit='spades')
+2 Card(rank='3', suit='spades')
+3 Card(rank='4', suit='spades')
+...
+>>> 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]
+
+Rank test:
+
+>>> spades_high(Card('2', 'clubs'))
+0
+>>> spades_high(Card('A', 'spades'))
+51
+
+>>> for card in sorted(deck, key=spades_high):  # doctest: +ELLIPSIS
+...      print(card)
+Card(rank='2', suit='clubs')
+Card(rank='2', suit='diamonds')
+Card(rank='2', suit='hearts')
+...
+Card(rank='A', suit='diamonds')
+Card(rank='A', suit='hearts')
+Card(rank='A', suit='spades')

01-data-model/frenchdeck.py

@@ -0,0 +1,17 @@
+import collections
+
+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()
+
+    def __init__(self):
+        self._cards = [Card(rank, suit) for suit in self.suits
+                                        for rank in self.ranks]
+
+    def __len__(self):
+        return len(self._cards)
+
+    def __getitem__(self, position):
+        return self._cards[position]

01-data-model/vector2d.py

@@ -0,0 +1,24 @@
+from math import hypot
+
+class Vector:
+
+    def __init__(self, x=0, y=0):
+        self.x = x
+        self.y = y
+
+    def __repr__(self):
+        return 'Vector(%r, %r)' % (self.x, self.y)
+
+    def __abs__(self):
+        return hypot(self.x, self.y)
+
+    def __bool__(self):
+        return bool(abs(self))
+
+    def __add__(self, other):
+        x = self.x + other.x
+        y = self.y + other.y
+        return Vector(x, y)
+
+    def __mul__(self, scalar):
+        return Vector(self.x * scalar, self.y * scalar)