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@outerdef order():		print(‘welcome %s‘%LOGIN_USER[‘current_user‘])@outerdef change_pwd():		print(‘welcome %s‘%LOGIN_USER[‘current_user‘])@outerdef 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()

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