python 装饰器记录日志，python日志,from time im

python 装饰器记录日志，python日志,from time im

from time import timedef logged(when):    def log(f,*args,**kargs):        print("called: function:%s,args:%r,kargs:%r"%(f,args,kargs))    def pre_logged(f):        def wrapper(*args,**kargs):            log(f,*args,**kargs)            return f(*args,**kargs)    def post_logged(f):        def wrapped(*args,**kargs):            now=time()            try:                return f(*args,**kargs)            finally:                log(f,*args,**kargs)                print("time delta:%s"%(time()-now))        return wrapped    try:        return{"pre":pre_logged,"post":post_logged}[when]    except Exception as e:        print(e)@logged("post")def hello(name):    print("hello",name)@logged("post")def test(a,b=1):    print(a+b)hello("world")test(1,2)#该片段来自于http://byrx.net