(env) OpenTTD-website.andythenorth(17)$ python fetch-downloads.py 
Traceback (most recent call last):
  File "fetch-downloads.py", line 11, in <module>
    import aiohttp
  File "/Users/andy2/workspace/buildout.python/python-3.6/lib/python3.6/site-packages/aiohttp/__init__.py", line 6, in <module>
    from .client import (
  File "/Users/andy2/workspace/buildout.python/python-3.6/lib/python3.6/site-packages/aiohttp/client.py", line 12, in <module>
    from typing import (  # noqa
ImportError: cannot import name 'Coroutine'