装饰器 例:
import datetime import time from functools import update_wrapper class Logger3: '''this is logger3''' def __init__(self,fn): self.fn = fn update_wrapper(self,fn) def __call__(self, *args): start = datetime.datetime.now() self.fn(*args) delta = (datetime.datetime.now() - start).total_seconds() print(delta) @Logger3 #foo3 = Logger3(foo3) 类似于 a = A(add) def foo3(x, y): '''this foo3''' time.sleep(1) print(x+y) foo3(1,2) print(foo3.__doc__) print(foo3.__name__)