购物车（注册、登录、购物、购物车、结帐）

'''
购物车（注册、登录、购物、购物车、结帐）
'''

shopping_car_dict=dict()
money=[0]
def input_username_pwd():
    username=input('username:')
    pwd=input('pwd:')
    return username,pwd
def goods_get():
    with open('goods.txt','r',encoding='utf8')as fr:
        fr1=fr.read()
        fr2=eval(fr1)
        return fr2
fr2=goods_get()


def register():
    print('欢迎来到注册功能：')
    username,pwd=input_username_pwd()
    with open('user_info.txt','a',encoding='utf8')as fa:
        fa.write(f'{username}:{pwd}|')
def login():
    print('欢迎来到登录功能：')
    username,pwd=input_username_pwd()
    username1=f'{username}:{pwd}'
    with open('user_info.txt', 'r', encoding='utf8')as fr:
        fr2=fr.read()
        username2=fr2.split('|')
    if username1 in username2:
        print('登录成功')
    else:
        print('密码不对')


def shopping():
    print('欢迎来到购物天堂：')
    while True:
        for ind,goods in enumerate(fr2):
            print(f'商品编号{ind}',goods)
        choice=input('请选择商品编号，退出请按q:')
        if choice=='q':
            break
        choice=int(choice)
        goods=fr2[choice]
        print(f'购买商品{goods}成功,
')
        goods_name=goods[0]
        if goods_name in shopping_car_dict:
            shopping_car_dict[goods_name]+=1
        else:
            shopping_car_dict[goods_name]=1
        money[0]+=goods[1]
    print(f'你购买的商品是{shopping_car_dict},总价是{money[0]}')




def shopping_car():
    print('欢迎来到购物车功能：')
    while True:
        print(f'你购买的商品是{shopping_car_dict},总价是{money[0]}')
        choice=input('请输入你要删除的商品编号，退出请按q:')
        if choice=='q':
            break
        shopping_car_dict[choice]-=1
        for goods in fr2:
            for choice in goods:
                money[0]-=goods[1]
def pay():
    print('欢迎来到付款中心')
    print(f'你购买的商品是{shopping_car_dict},总价是{money[0]}')
    choice=input('确认付款请按Y或y,清空购物车请按N或n:')
    if choice=='Y'or choice=='y':
        print(f'你已支付{money[0]}元，购买的商品是{shopping_car_dict}')
    elif choice=='N'or choice=='n':
        shopping_car_dict.clear()
        money[0]=0
        print('购物车已清空')
    else:
        print('输入不合法')












func_msg='''
1：注册
2：登录
3：购物
4：购物车
5：消费
'''
func_choice={
    '1':register,
    '2':login,
    '3':shopping,
    '4':shopping_car,
    '5':pay,
}
while True:
    print(func_msg)
    lc=input('请输入你想要选择的功能，退出请按q:')
    if lc=='q':
        break
    else:
        func_choice[lc]()