06-函数的嵌套

在一个函数内部调用另一个函数，即为嵌套。

def A():
    print('This is A')

def B():
    print('This is B')
    A()

B() # 调用B函数

This is B
This is A

def A():
    def B():
        print('This is B')
    print('This is A')
    B()

A()

This is A
This is B