习题：扑克牌发牌
- 发52张扑克牌到4个人，要随机，速度足够快
- 有人写了一个下面的例子，你觉得他的算法对吗？你能否比他写得好？
- 提示: random.shuffle()
import random,time
class timer:
def __init__(self):
self.start= time.time()
def stop(self):
self.end= time.time()
return "\n 本次运行已用时 %s秒"% (self.end-self.start)
class people:
#定义四个玩牌的人
jack = []
python = []
java = []
stephen = []
def print_jack(self):
i=0
tmp = ''
while i < 13:
tmp += self.jack[i]+' '
i += 1
return tmp
def print_python(self):
i=0
tmp = ''
while i < 13:
tmp += self.python[i]+' '
i += 1
return tmp
def print_java(self):
i=0
tmp = ''
while i < 13:
tmp += self.java[i]+' '
i += 1
return tmp
def print_stephen(self):
i=0
tmp = ''
while i < 13:
tmp += self.stephen[i]+' '
i += 1
return tmp
class agent(people):
def __init__(self):
#定义一个空的列表存放牌
self.card = []
#定义洗牌的次数，并不是越大牌就越乱
self.count = 52
#定义一个基本的牌序
self.base = ['A','2','3','4','5','6','7','8','9','10','J','Q','K']
def arrangement(self):
#重新排列纸牌
i = 0
while i < 13:
self.card.insert(0,'黑桃'+self.base[i])
i += 1
i = 0
while i < 13:
self.card.insert(0,'红桃'+self.base[i])
i += 1
i = 0
while i < 13:
self.card.insert(0,'草花'+self.base[i])
i += 1
i = 0
while i < 13:
self.card.insert(0,'方块'+self.base[i])
i += 1
def shuffle(self):
#洗牌
i = 1
while i < self.count:
#产生一个随机数来确定要交换牌的位置
position = random.randint(0,51)
#临时取出一张牌准备用来交换位置
tmp = self.card[position]
#交换随机位置的牌和第一张牌
self.card[position] = self.card[0]
self.card[0] = tmp
i += 1
def outcards(self):
#发牌
i = 0
while i < 52:
if i <= 12:
self.jack.insert(0,self.card[i])
elif i >= 12 and i <= 25 :
self.python.insert(0,self.card[i])
elif i >= 25 and i <= 38 :
self.java.insert(0,self.card[i])
elif i >= 38 and i <= 52 :
self.stephen.insert(0,self.card[i])
i += 1
start=timer()
a=agent()
a.arrangement()
a.shuffle()
a.outcards()
print a.print_jack()
print a.print_python()
print a.print_java()
print a.print_stephen()
print start.stop()
其他方法
- 关于牌的表示(另一种方法)
- suit表花色['Clubs', 'Diamonds', 'Hearts', 'Spades'], suit = 2就是红桃
- rank表大小rank = [None, 'Ace', '2','3','4','5','6','7','8','9','10','Jack','Queen','King']加一个None, 是为了让rank[2] = '2'和数字2对应起来
class Card(object):
'''Represents a standard playing card.'''
def __init__(self, suit = 0, rank = 2):
self.suit = suit
self.rank = rank
suit_names = ['Clubs', 'Diamonds', 'Hearts', 'Spades']
rank_names = [None, 'Ace', '2','3','4','5','6','7','8','9','10','Jack','Queen','King']
def __str__(self):
return "%s of %s" % (Card.rank_names[self.rank], Card.suit_names[self.suit])
card1 = Card(2, 7)
print card1
- 关于牌组(Deck)的表示
- 连续打印牌组
class Deck(object):
def __init__(self):
self.cards = []
for suit in range(4):
for rank in range(1, 14):
card = Card(suit, rank)
self.cards.append(card)
def __str__(self):
res = []
for card in self.cards:
res.append(str(card))
return '\n'.join(res)
deck = Deck()
print deck
- 洗牌, 对列表deck.cards用random.shuffel
import random random.shuffel(deck.cards)
- 写进deck class, 再看一下前五张牌
import random
class Deck(object):
def __init__(self):
self.cards = []
for suit in range(4):
for rank in range(1, 14):
card = Card(suit, rank)
self.cards.append(card)
def __str__(self):
res = []
for card in self.cards:
res.append(str(card))
return '\n'.join(res)
def pop_card(self):
return seld.cards.pop()
def add_card(self, card):
self.cards.append(card)
def shuffle(self):
random.shuffle(self.cards)
>>> deck.shuffle()
>>> print deck
Ace of Clubs 2 of Hearts
2 of Clubs Jack of Hearts
3 of Clubs Jack of Spades
4 of Clubs 2 of Diamonds
5 of Clubs Ace of Clubs
- 发牌, 对洗牌后的deck.cards列表用已有的方法pop_card, 也就是抽最后一张牌, 在deck class里面加上新方法remove cards
def remove_cards(self, hand, num):
for i in range(num):
hand.cards.append(self.pop_card())
比如发给'Python'13张牌
class Hand(Deck):
'''Represents a hand of playing cards.'''
def __init__(self, label = ''):
self.cards = []
self.label = label
hand = Hand('Python')
deck = Deck()
deck.shuffle()
deck.remove_cards(hand, 13)
看一下python的手牌
>>> print hand
7 of Diamonds
Queen of Clubs
Jack of Clubs
6 of Hearts
7 of Spades
King of Diamonds
3 of Spades
2 of Diamonds
5 of Clubs
10 of Diamonds
Ace of Spades
9 of Spades
10 of Spades
现在deck牌组就只剩下39张牌了:
>>> len(deck.cards)
39
- 稍微修改一下就是给四个人发牌
deck = Deck()
deck.shuffle()
player_names = ['jack', 'python', 'java', 'steven']
hands = {}
for i in range(4):
hand = Hand(player_names[i])
deck.move_cards(hand, 13)
hands[player_names[i]]=hand
print "%s 's hand cards are: " % player_names[i]
print hand
jack 's hand cards are Jack of Diamonds 3 of Hearts 7 of Hearts Jack of Clubs 10 of Diamonds 7 of Diamonds 9 of Spades 9 of Diamonds King of Diamonds 10 of Hearts King of Clubs 9 of Clubs 6 of Clubs python 's hand cards are 2 of Spades 4 of Clubs King of Hearts Ace of Clubs Ace of Diamonds 8 of Clubs Queen of Hearts 3 of Clubs Ace of Hearts 3 of Spades 7 of Spades 4 of Diamonds 8 of Hearts java 's hand cards are 6 of Hearts Queen of Spades 7 of Clubs Queen of Diamonds King of Spades 5 of Hearts 8 of Spades 4 of Spades 5 of Clubs 2 of Diamonds 2 of Hearts 4 of Hearts 10 of Clubs steven 's hand cards are 5 of Diamonds Jack of Spades Queen of Clubs 3 of Diamonds 10 of Spades 2 of Clubs 8 of Diamonds Jack of Hearts 6 of Diamonds 5 of Spades 6 of Spades Ace of Spades 9 of Hearts
- 看一下时间, 总共不到0.2s
start = datetime.now() end = datetime.now() print "the time lasped is :", end - start the time lasped is : 0:00:00.152000
做的不错啊— 俞熹 2014/11/17 13:29
其实这是我看<像计算机学家一样思考Python>书时候, 从书上抄下来的 — 付聿炜 2015/01/25 11:08