ImportError: cannot import name 'errors'

[mohit-jcc]

On server run, this is the trace returned :

python server.py 
Traceback (most recent call last):
  File "server.py", line 10, in <module>
    from sockjs.tornado import SockJSRouter
  File "/Users/mohit/anaconda/envs/py34/lib/python3.4/site-packages/sockjs/__init__.py", line 20, in <module>
    from sockjs.route import get_manager, add_endpoint
  File "/Users/mohit/anaconda/envs/py34/lib/python3.4/site-packages/sockjs/route.py", line 11, in <module>
    from sockjs.transports import handlers
  File "/Users/mohit/anaconda/envs/py34/lib/python3.4/site-packages/sockjs/transports/__init__.py", line 3, in <module>
    from .jsonp import JSONPolling
  File "/Users/mohit/anaconda/envs/py34/lib/python3.4/site-packages/sockjs/transports/jsonp.py", line 8, in <module>
    from .base import StreamingTransport
  File "/Users/mohit/anaconda/envs/py34/lib/python3.4/site-packages/sockjs/transports/base.py", line 2, in <module>
    from aiohttp import errors
ImportError: cannot import name 'errors'