1

def foo():print('foo')def bar():print('bar')

dic={'foo':foo,'bar':bar,
}while True:
    choice=input('>>: ').strip()if choice in dic:
        dic[choice]()

 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+=1return x


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

def f1():
    x=0def counter():
        nonlocal x
        x+=1return xreturn counter

counter=f1()print(counter())print(counter())print(counter())print(counter())print(counter())