Python3.5装饰器典型案例分析

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
#高阶函数+嵌套函数==>装饰器
import time
def 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decor
test2()

#高阶函数+嵌套函数==>装饰器
import time
def 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)

#高阶函数+嵌套函数==>装饰器
import time
def 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decor
test2("liu",23)