用装饰器实现简单的登录

login_status = False
msg = '''1.home
2.finance
3.book'''

def login(auth_type):
  def func(fun):
    def inner():
      global login_status
      if login_status ==  False:
        username = input('username>>>')
        passwd = input('passwd>>>')
        if auth_type == 'jingdong':
          with open('passwd.txt','r') as f :
            text = f.read().split(';')
            if username == text[0] and passwd == text[1]:
              print('welcome')
              fun()
              login_status = True
            else:
              print('wrong')
        elif auth_type == 'weicin':
          with open('text.txt','r') as f :
            if username == text[0] and passwd == text[1]:
              print('welcome')
              fun()
              login_status = True
            else:
              print('wrong')
    return inner
  return func

@login(auth_type = 'jingdong')
def home():
  print('home')

@login(auth_type = 'weixin')
def finance():
  print('finance')

@login(auth_type = 'jingdong')
def book():
  print('book')


           
          
while True:
  print(msg)
  a = input('>>>')
  if a == '1':
    home()
  elif a == '2':
    finance()
  elif a == '3':
    book()