2016/09/16

1.　Python视频

　　B. 装饰器

　　装饰器实例：用户管理程序

LOGIN_USER = {‘is_login‘: False}

def outer(func):
	def inner(*args, **kwargs):
		if LOGIN_USER[‘is_login‘]:
			r = func()
			return r
		else:
			print(‘please login‘)
	return inner

@outer
def order():
		print(‘welcome %s‘%LOGIN_USER[‘current_user‘])

@outer
def change_pwd():
		print(‘welcome %s‘%LOGIN_USER[‘current_user‘])

@outer
def manager():
		print(‘welcome %s‘%LOGIN_USER[‘current_user‘])

def login(user, pwd):
	if user == ‘alex‘ and pwd == ‘123‘:
		LOGIN_USER[‘is_login‘] = True
		LOGIN_USER[‘current_user‘] = user
		print(‘welcome %s‘ % LOGIN_USER[‘current_user‘])

def main():
	while True:
		inp = input(‘1.login  2.manager  3.change pwd  4.order‘)
		if inp == ‘1‘:
			username = input(‘input username‘)
			pwd = input(‘input password‘)
			login(username, pwd)
		elif inp == ‘2‘:
			manager()
		elif inp == ‘3‘:
			change_pwd()
		elif inp == ‘4‘:
			order()

main()

2.　time module

import time
start = time.clock()
...
...
end = time.clock()
print( ‘program processing time: %f‘%(end - start))