boxsdk demo/auth.py fails on from boxsdk import OAuth2 - python-3.x

Question

Running on python 3.6 (anaconda)
Tried to run authenticate() within boxsdk: demo/auth.py and get error on import.
Looks like error is happening in /anaconda/lib/python3.6/site-packages/boxsdk/object/events.py....
class EventsStreamType(with_metaclass(ExtendableEnumMeta, TextEnum)):
I did look thru other posts but don't see solution
python - Fix 'new enumerations must be created as' - Stack Overflow
boxsdk 1.x does not import in python 3.6.0 · Issue #195 · box/box ...
ERROR
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-33-e86018378e6f> in <module>()
9 from wsgiref.simple_server import WSGIServer, WSGIRequestHandler, make_server
10
---> 11 from boxsdk import OAuth2
12
13
/anaconda/lib/python3.6/site-packages/boxsdk/__init__.py in <module>()
4
5 from .auth import JWTAuth, OAuth2
----> 6 from .client import * # pylint:disable=wildcard-import,redefined-builtin
7 from .object import * # pylint:disable=wildcard-import,redefined-builtin
8 from .version import __version__
/anaconda/lib/python3.6/site-packages/boxsdk/client/__init__.py in <module>()
3 from __future__ import unicode_literals, absolute_import
4
----> 5 from .client import Client
6 from .developer_token_client import DeveloperTokenClient
7 from .development_client import DevelopmentClient
/anaconda/lib/python3.6/site-packages/boxsdk/client/client.py in <module>()
10 from ..object.folder import Folder
11 from ..object.search import Search
---> 12 from ..object.events import Events
13 from ..object.file import File
14 from ..object.group import Group
/anaconda/lib/python3.6/site-packages/boxsdk/object/events.py in <module>()
13
14 # pylint:disable=too-many-ancestors
---> 15 class EventsStreamType(with_metaclass(ExtendableEnumMeta, TextEnum)):
16 """An enum of all possible values of the `stream_type` parameter for user events.
17
/anaconda/lib/python3.6/enum.py in __prepare__(metacls, cls, bases)
117 enum_dict = _EnumDict()
118 # inherit previous flags and _generate_next_value_ function
--> 119 member_type, first_enum = metacls._get_mixins_(bases)
120 if first_enum is not None:
121 enum_dict['_generate_next_value_'] = getattr(first_enum, '_generate_next_value_', None)
/anaconda/lib/python3.6/enum.py in _get_mixins_(bases)
437 # base is now the last base in bases
438 if not issubclass(base, Enum):
--> 439 raise TypeError("new enumerations must be created as "
440 "`ClassName([mixin_type,] enum_type)`")
441
TypeError: new enumerations must be created as `ClassName([mixin_type,] enum_type)`