网站实现验证功能装饰器：

import time

user,passwd='alex','abc123'

def auth(func):

def wrapper(*args,**kwargs):

print("wraper func args:",*args,**kwargs)

username=input("Username:").strip()

password=input("Password:").strip()

if user==username and passwd==password:

print("\033[32;1mUser has passed authentication\033[0m")

func(*args,**kwargs)#

#print("---after authentication---")#保留要装饰函数home的输出结果

#return res

else:

exit("\033[31;1mInvalid username or password\033[0m")

return wrapper

def index():

print("welcome to index page")

@auth

def home():

print("welcome to home page ")

return "from home"

@auth

def bbs():

print("welcome to bbs page")

index()

home()

print(home())#执行结果为空，调用home相当于调用wraper

bbs()

保留要装饰函数的返回结果：

import time

user,passwd='alex','abc123'

def auth(func):

def wrapper(*args,**kwargs):

print("wraper func args:",*args,**kwargs)

username=input("Username:").strip()

password=input("Password:").strip()

if user==username and passwd==password:

print("\033[32;1mUser has passed authentication\033[0m")

res=func(*args,**kwargs)#

print("---after authentication---")#保留要装饰函数home的输出结果

return res

else:

exit("\033[31;1mInvalid username or password\033[0m")

return wrapper

def index():

print("welcome to index page")

@auth

def home():

print("welcome to home page ")

return "from home"

@auth

def bbs():

print("welcome to bbs page")

index()

home()

print(home())#执行结果为空，调用home相当于调用wraper

bbs()

不同网页不同验证方式的装饰器：

import time

user,passwd='alex','abc123'

def auth(auth_type):

print("auth func:",auth_type)

def outer_auth(func):

def wrapper(*args,**kwargs):

print("wraper func args:",*args,**kwargs)

if auth_type=="local":

username=input("Username:").strip()

password=input("Password:").strip()

if user==username and passwd==password:

print("\033[32;1mUser has passed authentication\033[0m")

res=func(*args,**kwargs)#

print("---after authentication---")#保留要装饰函数home的输出结果

return res

else:

exit("\033[31;1mInvalid username or password\033[0m")

elif auth_type=="ldap":

print("搞毛线ldap,不会。。。。")

return wrapper

return outer_auth

def index():

print("welcome to index page")

@auth(auth_type="local")

def home():

print("welcome to home page ")

return "from home"

@auth(auth_type="ldap")

def bbs():

print("welcome to bbs page")

index()

home()

print(home())#执行结果为空，调用home相当于调用wraper

bbs()