python实现简单的购物小程序~

#  author : tang
#  qq     : 1440535574
#  time   : 2018/4/27  9:51:15


producty_list = [
    ('computer', 5000),
    ('xiaomi6', 2500),
    ('bed', 500),
    ('chair', 280),
    ('cup', 5)

]
shopping_list = []
info = """-----    supermarket info    -----
1.Please enter the goods number you want to buy
2.input quit to quit
3.input check to check your shop cart
4.input good to see goods
"""
print(info)

while True:
    money = input("please input your money:")
    if money.isdigit():
        if int(money) >= 0:
            money = int(money)
        break
    else:
        print("input money is wrong!")
        continue


def good():
    for i, item in enumerate(producty_list):
        print(i, item)


good()

while True:

    buy = input("input the good number ,or quit or check:")
    if buy == 'quit':
        print("good bye")
        break
    if buy == 'good':
        good()
        continue
    elif buy == 'check':
        print("Shop cart has", shopping_list)
        continue

    if buy.isdigit():
        buy = int(buy)
        if buy in range(len(producty_list)):
            if money >= producty_list[buy][1]:
                producty_name = producty_list[buy][0]
                money -= producty_list[buy][1]
                shopping_list.append(producty_list[buy][0])
                print("{0} has added to your shoppong cart,you have {1} yuan left.".format(producty_name, money))

            else:
                print("you don't have enough money!")
        else:
            print("There's no goods you want here")
    else:
        print("I cant understand what you want to buy.....")