8-[函数]-嵌套函数，匿名函数，高阶函数，递归函数

name = "Alex"

def change_name():
    name = "Alex2"

    def change_name2():
        name = "Alex3"
        print("第3层打印", name)

    change_name2()  # 调用内层函数
    print("第2层打印", name)


change_name()
print("最外层打印", name)

第3层打印 Alex3
第2层打印 Alex2
最外层打印 Alex

age = 18
def func1():
    age = 73
    def func2():
        print(‘---2‘)
    return func2

val = func1()
print(val)   # <function func1.<locals>.func2 at 0x024601E0>
val()

C:\Python34\python.exe C:/PycharmProjects/Luffy_project/21天入门/模块2/fun/fun3.py
<function func1.<locals>.func2 at 0x006201E0>
---2

def cal(x,y):
    print(x*y)

cal(3,5)

# 结果
15

def cal(x,y):
    return x*y

val = cal(3,5)
print(val)

func = lambda x,y :x*y  # 声明一个匿名函数
val = func(3,5)
print(val)

# 结果
15

def cal(x,y):
    if x> y:
        return x/y
    else:
        return x*y

val = cal(3,5)
print(val)


### 结果
15

# 匿名函数  三元运算

func = lambda x,y : x/y if x>y else x*y
val = func(5,6)
print(val)

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]