def fn():
    print("我叫fn")

fn()
print(fn)  # <function fn at 0x0000000001D12E18>
fn()
gn = fn # 函式名可以進行賦值
print(gn)
gn()

fn = 666
print(fn) # 666


def func1():
    print("朱祁鎮")

def func2():
    print("徐階")

def func3():
    print("王陽明")

def func4():
    print("魏忠賢")

lst = [func1, func2, func3, func4] # 函式+() 就是呼叫.
print(lst)

lst[0]()
for el in lst: #  el是列表中的每一項.
    el() # 拿到函式. 執行函式


a = 10
b = 20
c = 30
lst = [a, b, c]
print(lst)


def wrapper():
    def inner():
        print("我的天, 還可以扎樣寫")
    print(inner) # <function wrapper.<locals>.inner at 0x00000000028989D8>
    inner()
    return inner

ret = wrapper() # <function wrapper.<locals>.inner at 0x00000000028989D8>
print(ret)
ret()

def wrapper():
    def inner():
        print("哈哈哈")
    return inner  # 函式名可以像返回值一樣返回

ret = wrapper()
ret() # 在函式外面訪問了函式內部的函式
ret()
ret()


def func1():
    a = 10
    return a
print(func1())

# 函式可以作為引數進行傳遞

def func1():
    print("謝晉")

def func2():
    print('楊士奇')

def func3():
    print('徐渭')

def func4():
    print("柳如是")

# 代理. 裝飾器的雛形
def proxy(a): # a就是變數. 形參
    print("我是代理")
    a()
    print("代理執行完畢")

proxy(func1)
proxy(func3)
proxy(func4)