1 def outer(fun):
 2     def warper():
 3         print("outer 1")
 4         fun()                  #相当于把下边两个函数当参数传入进来
 5         print("outer 3")
 6     return warper
 7 
 8 @outer
 9 def test1():
10     print("test1 2")
11 @outer
12 def test2():
13     print("test2 2")           
14 test1()
15 test2()
-----------------结果-----------------
16 outer 1
17 test1 2
18 outer 3
19 outer 1
20 test2 2
21 outer 3

 1 def outer(fun):
 2     def warper(*args,**kwargs):
 3         print("加的第一个功能在函数之前")
 4         fun(*args,**kwargs)
 5         print("加的第二个功能在函数之后")
 6     return warper
 7 
 8 @outer
 9 def test1(*args,**kwargs):
10     print(args,kwargs)
11     return
12 
13 
14 test1(123,"waa","yyy",name="wsy",Age=18)
15 ----------------结果----------------------
16 加的第一个功能在函数之前
17 (123, 'waa', 'yyy') {'name': 'wsy', 'Age': 18}
18 加的第二个功能在函数之后

import time

def timer(func):

    def deco(*args,**kwargs):
        start = time.time()
        print("装饰器：功能1")
        func(*args,**kwargs)
        print("装饰器：功能2")
        end = time.time()
        print("func run time is %s" %(end - start))
    return deco

@timer
def test1():
    time.sleep(1)
    print("in the test1")
@timer
def test2(*args,**kwargs):
    time.sleep(1)
    print("in the test1",args,kwargs)

test1()
test2(1,2,3,4,name="wsy",age=20)
--------------------结果------------------------
装饰器：功能1
in the test1
装饰器：功能2
func run time is 1.0000572204589844
装饰器：功能1
in the test1 (1, 2, 3, 4) {'name': 'wsy', 'age': 20}
装饰器：功能2
func run time is 1.0000572204589844

 1 user,passwd = "wsy","123"
 2 def auth(auth_type):
 3     print("auth func:",auth_type)
 4     def outer_wrapper(func):
 5         def wrapper(*args,**kwargs):
 6             print("wrapper func args:", *args,**kwargs)
 7             if auth_type == "local": # 如果装饰器参数是local 就
 8                 username = input("Username:").strip() # 输入用户名
 9                 password = input("Password:").strip() # 输入密码
10                 if user == username and passwd == password: # 判断如果正确
11                     print("\033[32;1mUser has passwd authentication\033[0m")
12                     res = func(*args,**kwargs) #from home
13                     print("-------after authenticaion")
14                     return res
15                 else:
16                     exit("\033[31;1mInvalid username or password \033[0m")
17             elif auth_type == "ldap": # 如果装饰器参数是ldap
18                 print("hehe")
19         return wrapper
20     return outer_wrapper
21 
22 
23 def index():
24     print("welcome to index page")
25 
26 @auth(auth_type="local")
27 
28 def home():
29     print("welcome to home page")
30     return "from home"
31 @auth(auth_type="ldap")
32 def bbs():
33     print("welcome to bbs page")
34 index()
35 print (home())
36 bbs()
37 -----------------------结果-----------------------
38 auth func: local
39 auth func: ldap
40 welcome to index page
41 wrapper func args:
42 Username:wsy
43 Password:123
44 User has passwd authentication
45 welcome to home page
46 -------after authenticaion
47 from home
48 wrapper func args:
49 hehe