Python3 5 裝飾器之案例剖析

#!/usr/bin/env python

# -*- coding:utf-8 -*-
# author:zhengzhengliu
#高階函式+巢狀函式==>裝飾器
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)) #列印deco的位址
#test1 = timer(test1)
#test2 = timer(test2)
test1() #-->執行decor
test2()
#執行結果：#.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

#高階函式+巢狀函式==>裝飾器

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)
#執行結果 :
#test2: liu 23
#the run time of func is 0.0

#高階函式+巢狀函式==>裝飾器

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() #-->執行decor
test2("liu",23)
#執行結果：
#in the test1
#the run time of func is 3.0036065578460693
#test2: liu 23
#the run time of func is 1.0084023475646973

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