python 装饰器

python 的装饰器
举例说明

def logging(level):
    def outwrapper(func):
        def wrapper(*args, **kwargs):
            print("[{0}]: enter {1}()".format(level, func.__name__))
            return func(*args, **kwargs)
        return wrapper
    return outwrapper

@logging(level="INFO")
def hello(a, b, c):
    print(a, b, c)

hello("hello,","good","morning")
-----------------------------
>>>[INFO]: enter hello()
>>>hello, good morning

相当于执行logging(level='INFO')(hello)(a,b,c).变成outwrapper(hello)(abc),变成wrapper(abc),完成.
参考

https://zhuanlan.zhihu.com/p/87353829