15. The study summarizes the parameters decorator # # have more than a decorative function decorator

There are parameters decorator

# 在装饰器的基础上再套一层
@auth("QQ")
def foo():
    pass
f = auth("qq")
foo = f(foo)
foo()

A plurality of means is a function decorator

# 先执行离被装饰的函数最近的语法糖
# 小技巧:进入装饰器从上往下,走到最会一个装饰器执行被装饰的函数,退出装饰器从下往上走

def wrapper1(func):
    def inner1(*args,**kwargs):
        print(1)
        func(*args,**kwargs)
        print(11)
    return inner1

def wrapper2(func):  # func == foo
    def inner2(*args,**kwargs):
        func(*args, **kwargs)
        print(22)
    return inner2

def wrapper3(func):
    def inner3(*args,**kwargs):
        print(3)
        func(*args, **kwargs)
        print(33)
    return inner3

@wrapper1  # 1 11
@wrapper3  # 3 33
@wrapper2  #  8 22

def foo():
    print(8)