fruit = {‘Apple‘: 3, ‘Pear‘: 2, ‘Banana‘: 3, ‘Lemon‘: 5, ‘Watermelon‘: 4}
books = {‘语文‘: 4, ‘英语‘: 3, ‘数学‘: 5, ‘体育‘: 1}
cart = {}
# goods = []
print(‘水果如下价格：‘)
print(fruit)
print(‘课本价格如下：‘)
print(books)
flag = input(‘请问您是否需要购物，如果需要购物请输入1‘)
print(flag)
while flag == ‘1‘:
    goods = str(input(‘请输入您要购买的商品：‘))
    print(goods)
    if goods in fruit.keys():            #判断商品是否属于水果
        cart[goods] = fruit[goods]
    elif goods in books.keys():          #判断商品是否属于books
        cart[goods] = books[goods]
    else:
        print(‘没有这个商品。‘)
    flag = input(‘请问您是否需要继续购物，是选1，显示购物车选3。‘)   #选择继续购物还是去购物车查看。

if flag == ‘3‘:
    print(cart)

i = 0
for j in cart.values():
    i = i + j
print(‘价格总和为：%s‘%i)