ImportError: cannot import name 'errors' - python-3.x

Question

Using sockjs with Tornado. 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'

Answer 1

I would recommend you to upgrade python version to
Python 3.5+ and utilize PEP-492 aka async/await. If you are using Python 3.4 please replace await with yield from and async def with #coroutine e.g.:
async def coro(...):
ret = await f()
should be replaced by:
#asyncio.coroutine
def coro(...):
ret = yield from f()
from aiohttp documentaion:
Dependencies
Python 3.4.2+
chardet, multidict, async_timeout, yarl
Optionally you may install the cChardet and aiodns libraries (highly recommended for sake of speed).
$ pip install cchardet
$ pip install aiodns