Python - 随机卡

Question

我正在尝试在python中创建一个程序，当用户按下enter键时，计算机会显示一张随机卡。同一张卡不能打印两次。到目前为止我的代码是：

from random import *

used = []

number = randint(1,13)
if number == 11:
    number = 'Jack'
elif number == 12:
    number  = 'Queen'
elif number == 13:
    number = 'King'

suit = randint(1,4)
if suit == 1:
    suit = 'Hearts'
elif suit == 2:
   suit = 'Spades'
elif suit == 3:
    suit = 'Diamonds'
elif suit == 4:
    suit = 'Clubs'

end = False

while end == False :
    get = raw_input('Press enter to get a card')
    if get == 'end':
        end == True
        continue
    card = number , suit
    for i in (used):
        if card == i:
            continue
        used.append(card)
    print card

到目前为止，每次用户按下Enter键时，它只输出相同的卡片，当用户输入“结束”时，程序不会结束。任何人都可以找到错误吗？

Answer 1

问题是你在while循环中分配

card = number, suit

但是number和suit在您进入循环之前被选中了一次，因此永远不会改变。每次循环时都需要重新分配number和suit。

此外，您正在迭代used中的卡片，但最初没有卡片，因此循环将永远不会执行。由于card used添加到for的唯一位置位于used循环内，因此永远不会向Spree::Order.complete.where( Spree::Order.arel_table[:completed_at].gteq( Date.new(2015, 10, 1) ) ).joins( line_items: :variant ).select(:sku).distinct.pluck(:sku) 添加任何内容。

Answer 2

其他人已经解释了为什么你的代码失败了。这是一种不同的方法。

只需生成一个套牌，使用random.shuffle对其进行随机播放，然后根据需要进行迭代：

import random

ranks = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'Jack', 'Queen', 'King', 'Ace']
suits = ['Hearts', 'Diamonds', 'Clubs', 'Spades']
deck = [rank, suit for rank in ranks for suit in suits]
random.shuffle(deck)

for card in deck:
    if raw_input('Press <enter> to get a card') == '': # enter pressed
        print card
    else:
        break
else: # for loop not broken.
    print 'all cards have been dealt'

Answer 3

将卡片选择放入while循环中。正如摩根所说。像这样：

from random import *

used = []


end = False

while end == False :

    number = randint(1,13)
    if number == 11:
        number = 'Jack'
    elif number == 12:
        number  = 'Queen'
    elif number == 13:
        number = 'King'

    suit = randint(1,4)
    if suit == 1:
        suit = 'Hearts'
    elif suit == 2:
       suit = 'Spades'
    elif suit == 3:
        suit = 'Diamonds'
    elif suit == 4:
        suit = 'Clubs'
    get = raw_input('Press enter to get a card')
    if get == 'end':
        end == True
        continue
    card = number , suit
    for i in (used):
        if card == i:
            continue
        used.append(card)
    print card