trio support

[dhirschfeld-shell]

Feature Request

My async library of choice is trio rather than asyncio. Since perspective now supports starlette which in turn supports trio via the anyio library I'm wondering if it will Just Work, or if there are hard-coded asyncio assumptions in perspective itself which will prevent that?

If the latter, this issue can be a feature request to replace any hard-coded asyncio assumptions with their anyio equivalents.

[dhirschfeld]

I plan to test this out via trial and error, but it would be good to know if it is expected that trio should work or is expected to fail.

[timkpaine]

this file should be the only one with asyncio expectations https://github.com/finos/perspective/blob/master/python/perspective/perspective/handlers/common.py#L63
https://github.com/finos/perspective/blob/master/python/perspective/perspective/handlers/common.py#L75
https://github.com/finos/perspective/blob/master/python/perspective/perspective/handlers/common.py#L99

[dhirschfeld]

Thanks for the info @timkpaine! If it's just that file, it seems feasible to try patching it. If I get something working with trio I'll make sure to post back here with my solution.

It may take a little while as it will probably be a case of implementing with asyncio first and then porting to ensure I don't break anything...