Python 基础小项目（2）----购物车

ゝ一纸荒年。 2022-05-18 06:48 226阅读 0赞

代码如下：
    
    #模拟购物车
    #功能简介：
        # 1 添加商品，可以设置商品的数目
        # 2 删除商品，可以减少商品数目
        # 3 允许清空购物车
        # 4 可以统计商品的总金额、
    #购物车
    shoppingCart={}
    #仓库{id,name,price,num}
    shopStore={1:{'id': 1, 'name': '苹果', 'price': 2, 'num': 3},2: {'id': 2, 'name': '烧鸡', 'price': 1, 'num': 23},
               3: {'id': 3, 'name': '肉', 'price': 2, 'num': 33},4: {'id': 4, 'name': '豆腐', 'price': 4, 'num': 19}}
    #计算总价
    def totalCost():
        global shoppingCart#声明全局变量
        sumCost=0#总消费
        for k,v in shoppingCart.items():
            sumCost+=v['price']*v['num']#单价*数目
        return sumCost
    def addFGoods(id,name,price,num):
        global shoppingCart  # 声明全局变量
        if id not in shoppingCart:
            shoppingCart[id]={'id':id,'name':name,'price':price,
                              'num':num}
        else:
            shoppingCart[id]['num']+=num
        print(totalCost())
        print(shoppingCart)
    def delGoods(id,num):
        global shoppingCart  # 声明全局变量
        if id not in shoppingCart:
            return False
        elif shoppingCart[id]['num']>num:
            shoppingCart[id]['num']-=num
        else:
            shoppingCart.pop(id)
        print(totalCost())
        print(shoppingCart)
    def clearCart():
        global shoppingCart  # 声明全局变量
        shoppingCart.clear()
        print(shoppingCart)
    if __name__=='__main__':
        while True:
            id=int(input('Please input id'))
            num=int(input('please input num '))
            if id not in shopStore:
                print("id is not in ")
                i = int(input('如果想更改订单，请输入1，退出输入2，清空购物车输入0,继续购物请输入3'))
                if i == 1:
                    id = int(input('Please input id'))
                    num = int(input('please input num '))
                    delGoods(id, num)
                elif i == 2:
                    break
                elif i == 0:
                    clearCart()
                else:
                    continue
            elif shopStore[id]['num']>num:
                shopStore[id]['num']-=num
                addFGoods(id,shopStore[id]['name'],shopStore[id]['price'],num)
                print('已经加了购物车')
                i=int(input('如果想更改订单，请输入1，退出输入2，清空购物车输入0,继续购物请输入3'))
                if i==1:
                    id = int(input('Please input id'))
                    num = int(input('please input num '))
                    delGoods(id,num)
                elif i==2:
                    break
                elif i==0:
                    clearCart()
                else:
                    continue
            else:
                print("缺货")
                i = int(input('如果想更改订单，请输入1，退出输入2，清空购物车输入0,继续购物请输入3'))
                if i == 1:
                    id = int(input('Please input id'))
                    num = int(input('please input num '))
                    delGoods(id, num)
                elif i == 2:
                    break
                elif i == 0:
                    clearCart()
                else:
                    continue
    
    print('欢迎购物')
    
    运行结果：