from wsgiref.simple_server import make_server def index():     return  'index' def login():     return  'login' def routes():     urlpatterns=(         ('/index',index),         ('/login',login),     )     return urlpatterns def runserver(environ,start_response):     start_response('200 OK' , [('Content-Type','text/html')])     url = environ['PATH_INFO']     urlpatterns = routes()     func = None     for item in urlpatterns:         print (item)         if item[0] == url:             func=item[1]             break     if func:          a=func()          return  a     else:        return 'hhhhh404 404' if __name__ == '__main__':     httpd= make_server('192.168.6.163',8000,runserver)     print ('start web server')     httpd.serve_forever()