作业0320

1、函数对象优化多分支if的代码练熟

def login():
    print("登录")


def logon():
    print("注册")


def with_draw():
    print("提现")


def check_balance():
    print("查询余额")


def transfer():
    print('转账')


func_dic = {
    "0": ["退出", exit],
    "1": ["登录", login],
    "2": ["注册", register],
    "3": ["提现", with_draw],
    "4": ["查询余额", check_balance],
    "5": ["转账", transfer]
}

while 1:
    for x,y in func_dic.items():
        print(x,y[0])
    cmd = input("请输入要选择的功能:")
    if not cmd.isdigit():
        print("必须输入数字")
        continue
    if cmd in func_dic:
        func_dic[cmd][1]()
    else:
        print("功能不存在,请重新输入")

2、编写计数器功能，要求调用一次在原有的基础上加一

'''温馨提示：
    I:需要用到的知识点：闭包函数+nonlocal
    II:核心功能如下：
        def counter():
            x+=1
            return x


要求最终效果类似
    print(couter()) # 1
    print(couter()) # 2
    print(couter()) # 3
    print(couter()) # 4
    print(couter()) # 5

'''

def count_num():
    x = 0
    def counter():
        nonlocal x
        x+=1
        return x
    return counter

counter = count_num()
print(counter())
print(counter())
print(counter())
print(counter())
print(counter())