Zhiyu(Drew) Li zhiyuli

## multiauthenticator.py
from urllib.parse import urlsplit

from tornado import gen
from tornado.escape import url_escape
from tornado.httputil import url_concat

from traitlets import (
    Unicode, Integer, Dict, TraitError, List, Bool, Any,
    Type, Set, Instance, Bytes, Float,
    observe, default,
	from urllib.parse import urlsplit

	from tornado import gen
	from tornado.escape import url_escape
	from tornado.httputil import url_concat

	from traitlets import (
	Unicode, Integer, Dict, TraitError, List, Bool, Any,
	Type, Set, Instance, Bytes, Float,
	observe, default,