Python第一周学习笔记

salary = input('input your salary:')
if salary.isdigit():
    salary = int(salary)
    while True:
        for index,item in enumerate(product_list):
            print(index,item)
        user_choice = input('choice number:')
        if user_choice.isdigit():
            user_choice = int(user_choice)
            if user_choice < len(product_list) and user_choice >= 0:
                p_itam = product_list[user_choice]
                if p_itam[1] <= salary:
                    shopping_list.append(p_itam)
                    salary -= p_itam[1]
                    print('Goods %s has been added to the shopping cart, the balance is %s'%(p_itam,salary))
                else:
                        print('Sorry, the balance is not enough.balace is %s'%(salary))
            else:
                    print('Please enter the correct serial number')
        elif user_choice == 'q':
                print('----------shopping list-------------')
                for p in shopping_list:
                    print(p)
                print('your blance is %s \n --------END--------'%(salary))
                exit(print('Welcome to this system\n----Power By Erro----'))

else:
    print('Please enter the correct balance')

product_list = [    #列表实现购物清单和价格对应
    ('mac_pro',9800),
    ('iphone',6800),
    ('bike',800),
    ('watch',9000),
    ('coffee',60),
    ('book',120),
]
shopping_list = [] #建立购物车列表实现购物清单的显示

salary = input('input your salary:')

salary.isdigit()

for index,item in enumerate(product_list):
            print(index,item)