def outer(fun):
    def inner(*args,**kwargs):
        return fun(*args,**kwargs)
    return inner
# 使用裝飾器裝飾一下兩個(gè)函數(shù)
@outer
def num1():
    print('a')
@outer
def num2():
    print('b')
if __name__ == '__main__':
    print(num1.__name__)
    print(num2.__name__)
以上代碼輸出結(jié)果：
inner
inner
裝飾器的特性:使用自定義的裝飾器會(huì)改變被裝飾函數(shù)的函數(shù)名，一般裝飾器器是不用考慮這一點(diǎn)的，但是如果多個(gè)函數(shù)被兩個(gè)裝飾器裝飾就會(huì)報(bào)錯(cuò)，因?yàn)楹瘮?shù)名一樣

import functools
def outer(fun):
    @functools.wraps(fun)
    def inner(*args,**kwargs):
        return fun(*args,**kwargs)
    return inner

def async_call(fun):
    def wrapper(*args, **kwargs):
        Thread(target=fun, args=args, kwargs=kwargs).start()
    return wrapper

import time
def coast_time(func):
    def fun(*args, **kwargs):
        t = time.perf_counter()
        result = func(*args, **kwargs)
        print(f'func {func.__name__} coast time:{time.perf_counter() - t:.8f} s')
        return result
    return fun

from time import sleep
from time import time
import time
from threading import Thread
#這是統(tǒng)計(jì)時(shí)間的裝飾器
def coast_time(func):
    def fun(*args, **kwargs):
        t = time.perf_counter()
        result = func(*args, **kwargs)
        print(f'func {func.__name__} coast time:{time.perf_counter() - t:.8f} s')
        return result
    return fun
#這是創(chuàng)建線程的裝飾器,感興趣的可以保存一下，可以直接使用的
def async_call(fun):
    def wrapper(*args, **kwargs):
        Thread(target=fun, args=args, kwargs=kwargs).start()
    return wrapper
@coast_time
@async_call
def hello():
    print('start')
    sleep(2)
    print('end')
    return
if __name__ == "__main__":
    hello()