TypeError: 'Lock' object is not iterable on py3.9

[DavidBord]

As can be seen in the errors from Sanic build: https://travis-ci.org/github/huge-success/sanic/jobs/686952886
That's probably because of this py3.9 change: python/cpython@90d9ba6

[aaugustin]

OK, hopefully we can find syntax that works both on Python 3.6 and 3.9?

[ahopkins]

I think you can just use

async with...

I believe that async context managers have been in since before 3.6.

[DavidBord]

Sanic tests use an old version of websockets (0.7.0).
The usage of asyncio.Lock is fixed on newer websockets version (0.8.1).