-m asyncio -c 'await foo'

[chrysn]

Feature or enhancement

Proposal:

The asyncio module's runnable module behaves a lot like the regular interpreter, but is missing the -c option. This would be useful in using (as in: sharing them as minimal reproducers, or for feature probing in CI) little snippets of asyncio code without defining a function that's sent through asyncio.run.

Example that I'd like to see work:

$ python3 -m asyncio --help
[...]

options:
  -h, --help            show this help message and exit
 -c cmd                 program based passed in as a string, evaluated like the body of an async
                        function that is run to completion (terminates option list)
$ python3 -m asyncio -c 'await asyncio.sleep(1)'
$ python3 -m asyncio -c 'print(await asyncio.get_event_loop().getaddrinfo("::1", 1234))'

Minor questions

• Should the asyncio module be auto-imported? Probably yes, because this give the parity between "I pass something in to -c" and "I put something in the interactive interpreter" (which, in asyncio, also loads that module)

• Should there be a more explicit warning when someone tries to do python3 -m asyncio -c 'asyncio.sleep(1) (which does not await the future), or does the automatic ":1: RuntimeWarning: coroutine 'sleep' was never awaited" suffice?

• Should we also accept -i and -q for consistency? (Unlike the main CLI, asyncio always behaves as if -i was passed in, as evidenced by comparing dd | python3 -m asyncio / import this / Ctrl-D and dd | python3 / import this / Ctrl-D).

  That'd complete the list of options that it'd make sense to replicate under -m; the other options apply "through" -m asyncio and thus don't need to be duplicated. (Except -m, but that doesn't make any sense to nest).

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

[ZeroIntensity]

cc @kumaraditya303

[picnixz]

I'd say all those questions should be asked on DPO first.