标签:语法 登录 strip() glob 软件开发 参数 put login ica
1.闭包:
函数内部的子函数返回,在外部调用子函数时,其实函数已经结束,但是在调用子函数时,函数内部的局部变量任然有效。
1 def fun(): 2 n = 10 3 def fun1(): 4 print(‘n为:‘, n) 5 return fun1 6 7 f = fun() 8 print(f) 9 f() 10 11 <function fun.<locals>.fun1 at 0x000001DF0E6DFA60> 12 n为: 10
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2.装饰器:
参考:http://www.cnblogs.com/alex3714/articles/5765046.html
软件开发的一个原则:开放-封闭 原则
开放:对现有功能的扩展开放
封闭:已实现的功能代码块不应该被修改
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# 对河南和欧美专区认证,若是已经登录过,就不需要在登录。
# 2.1.语法糖 装饰器
user_state = False
def login(func):
def inner():
_username = ‘alice‘
_password = ‘123‘
global user_state
if user_state == False:
username = input(‘username:‘).strip()
password = input(‘password:‘).strip()
if username == _username and password == _password:
print(‘welcome to login...‘)
user_state = True
else:
print(‘wrong username or password‘)
else:
print(‘用户已经登录,认证通过‘)
if user_state == True:
func()
return inner
def home():
print(‘-----首页-----‘)
@login # america=login(america)
def america():
print(‘-----欧美专区-----‘)
def japan():
print(‘-----日韩专区-----‘)
@login # henan=login(henan)
def henan():
print(‘-----河南专区-----‘)
home()
henan()
america()
-----首页-----
username:alice
password:123
welcome to login...
-----河南专区-----
用户已经登录,认证通过
-----欧美专区-----
语法糖 装饰器
# 2.2.带参数的装饰器
user_state = False
def login(func):
def inner(*args, **kwargs):
_username = ‘alice‘
_password = ‘123‘
global user_state
if user_state == False:
username = input(‘username:‘).strip()
password = input(‘password:‘).strip()
if username == _username and password == _password:
print(‘welcome to login...‘)
user_state = True
else:
print(‘wrong username or password‘)
else:
print(‘用户已经登录,认证通过‘)
if user_state == True:
func(*args, **kwargs)
return inner
def home():
print(‘-----首页-----‘)
@login
def america():
print(‘-----欧美专区-----‘)
@login
def japan(x, y, z=5):
print(‘-----日韩专区-----‘, x, y, z)
@login
def henan(x):
print(‘-----河南专区-----‘, x)
home()
henan(‘haha‘)
america()
japan(‘japan‘, 1, z=7)
-----首页-----
username:alice
password:123
welcome to login...
-----河南专区----- haha
用户已经登录,认证通过
-----欧美专区-----
用户已经登录,认证通过
-----日韩专区----- japan 1 7
带参数的装饰器
# 2.3.带参数2的装饰器
user_state = False
def login(auth_type):
def outer(func):
def inner(*args, **kwargs):
_username = ‘alice‘
_password = ‘123‘
global user_state
if user_state == False:
username = input(‘username:‘).strip()
password = input(‘password:‘).strip()
if username == _username and password == _password:
print(‘welcome to login...‘)
user_state = True
else:
print(‘wrong username or password‘)
else:
print(‘用户已经登录,认证通过‘)
if user_state == True:
func(*args, **kwargs)
return inner
return outer
def home():
print(‘-----首页-----‘)
@login(‘wx‘)
def america():
print(‘-----欧美专区-----‘)
@login(‘wb‘)
def japan(x, y, z=5):
print(‘-----日韩专区-----‘, x, y, z)
@login(‘qq‘) #henan = login(‘qq‘)(henan) =inner
def henan(x):
print(‘-----河南专区-----‘, x)
home()
# xx = login(‘qq‘)
# henan = xx(henan)
henan(‘haha‘)
america()
japan(‘japan‘, 1, z=7)
-----首页-----
username:alice
password:123
welcome to login...
-----河南专区----- haha
用户已经登录,认证通过
-----欧美专区-----
用户已经登录,认证通过
-----日韩专区----- japan 1 7
带参数2的装饰器
标签:语法 登录 strip() glob 软件开发 参数 put login ica
原文地址:https://www.cnblogs.com/mazhen123456/p/8824811.html