从零开始的Python学习Episode 11——装饰器

 1 import time
 2 
 3 def show_time(f):
 4     def inner():
 5         start = time.time()
 6         f()
 7         end = time.time()
 8         print('time: %s'%(end-start))
 9     return inner
10 
11 @show_time
12 def fun1():
13     print('hello')
14     time.sleep(1)
15 
16 fun1()
#输出
#hello
#time: 1.000274896621704

 1 import time
 2 
 3 def show_time(f):
 4     def inner(a,b):
 5         start = time.time()
 6         f(a,b)
 7         end = time.time()
 8         print('time: %s'%(end-start))
 9     return inner
10 
11 @show_time
12 def fun1(x,y):
13     print(x+y)
14     time.sleep(1)
15 
16 fun1(1,2)
#输出
#3
#time: 1.0007870197296143

 1 import time
 2 
 3 def show_time(f):
 4     def inner(*args,**kwargs):
 5         start = time.time()
 6         f(*args,**kwargs)
 7         end = time.time()
 8         print('time: %s'%(end-start))
 9     return inner
10 
11 @show_time
12 def fun1(*args,**kwargs):
13     sum = 0
14     for i in args:
15         sum+=i
16     print(sum)
17     time.sleep(1)
18 
19 fun1(1,2,3,4,5)
#输出
#15
#time: 1.0009024143218994

import time
def judge(flag = 'False'):
    def show_time(f):
        def inner(*args,**kwargs):
            if flag == 'True':
                start = time.time()
                f(*args,**kwargs)
                end = time.time()
                print('time: %s'%(end-start))
            else:
                f(*args, **kwargs)
        return inner
    return show_time

@judge('True')
def add(*args,**kwargs):
    sum = 0
    for i in args:
        sum+=i
    print(sum)
    time.sleep(1)

@judge()
def multiple(*args,**kwargs):
    sum = args[0]
    for i in args:
        sum*=i
    print(sum)
    time.sleep(1)

add(1,2,3,4,5)
multiple(1,2,3,4,5)
#输出
#15
#time: 1.0006871223449707
#120