购物车

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功能：
1.循环输出商品列表
2.显示账户余额，判断能否买的起
3.选择相应商品的数字，将其加入购物车
4.输出购买的东西
随时能够退出
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dic = {
     1:[‘书本‘,10],
     2:[‘篮球‘,50],
     3:[‘足球‘,100],
     4:[‘车子‘,10000],
     5:[‘房子‘,100000]
    }
shop = []
for k,v in dic.items():
    print(‘{}\t\t{}\t\t{}‘.format(k,v[0],v[1]))
judgement = 1
balance = int(input(‘请输入你的预算‘))
s = input(‘请输入你想要的在1-{}范围内的商品序列号‘.format(len(dic)))
ss = 0
sss = 0
while judgement:
    if s.strip().isdigit():
        if int(s) <= len(dic) and int(s) > 0:
            ss = int(balance) // dic[int(s)][1]
            count = input(‘你可以买{}个，请输入你想买的个数‘.format(ss))
            sss = dic[int(s)][1] * int(count)
            while not (sss <= int(balance) and sss > 0):
                count = input(‘请重新输入购买个数,最多{}个‘.format(ss))
                sss = dic[int(s)][1]
                continue
            else:
                print(‘你购买了{0}个{1},共花去{2},还剩{3}‘.format(count,dic[int(s)][0],ss,int(balance) - ss))
                shop.append(‘{}*{}‘.format(dic[int(s)][0], count))
                s = input(‘是否继续购买，继续购买请继续输入在1-{}范围内的序列号，若想退出，输入q/Q‘.format(len(dic)))
            continue
        else:
            s = input(‘请输入1-{}范围内的数字‘.format(len(dic)))
            continue
    elif s.isalpha():
            if s.strip().upper() == ‘Q‘:
                # shop.append(‘{}*{}‘.format(dic[s][0],count))
                judgement = 0
            else:
                s = input(‘请输入1-{}范围内的数字‘.format(len(dic)))
                continue
    else:
        s = input(‘请输入1-{}范围内的数字‘.format(len(dic)))
        continue
print(shop)