12步轻松搞定python装饰器
Python3.5装饰器典型案例分析本文实例讲述了python3.5装饰器。分享给大家供大家参考，具体如下：
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#!/usr/bin/env python# -*- coding:utf-8 -*-# author:zhengzhengliu#高阶函数+嵌套函数==>装饰器import timedef timer(func): #timer(test1)-->func=test1 def decor(): start_time = time.time() func() #run test1 stop_time = time.time() print("the run time of func is %s" %(stop_time-start_time)) return decor@timer #test1 = timer(test1)def test1(): time.sleep(3) print("in the test1")@timer #test2 = timer(test2)def test2(): time.sleep(3) print("in the test2")print(timer(test1)) #打印deco的地址#test1 = timer(test1)#test2 = timer(test2)test1() #-->执行decortest2() |
运行结果：
<function timer.<locals>.decor at 0x00b720c0>
in the test1
the run time of func is 3.000171661376953
in the test2
the run time of func is 3.000171661376953
1、装饰器修饰有参数函数
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#高阶函数+嵌套函数==>装饰器import timedef timer(func): #timer(test1)-->func=test1 def decor(arg1,arg2): start_time = time.time() func(arg1,arg2) #run test2 stop_time = time.time() print("the run time of func is %s" %(stop_time-start_time)) return decor@timer #test2 = timer(test2) = decor test2(name)==>decor(name)def test2(name,age): print("test2:",name,age)test2("liu",23) |
运行结果 :
test2: liu 23
the run time of func is 0.0
2、装饰器修饰多个函数，有的函数带参数，有的函数不带参数的情况（采用参数组）
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#高阶函数+嵌套函数==>装饰器import timedef timer(func): #timer(test1)-->func=test1 def decor(*args,**kwargs): start_time = time.time() func(*args,**kwargs) #run test1 stop_time = time.time() print("the run time of func is %s" %(stop_time-start_time)) return decor@timer #test1 = timer(test1)def test1(): time.sleep(3) print("in the test1")@timer #test2 = timer(test2) = decor test2(name)==>decor(name)def test2(name,age): time.sleep(1) print("test2:",name,age)#test1 = timer(test1)#test2 = timer(test2)test1() #-->执行decortest2("liu",23) |
运行结果：
in the test1
the run time of func is 3.0036065578460693
test2: liu 23
the run time of func is 1.0084023475646973
希望本文所述对大家python程序设计有所帮助。
原文链接：https://blog.csdn.net/loveliuzz/article/details/77878019