recommend what to use instead of asyncio.get_event_loop in 3.14 what's new

[graingert]

          Could you please mention what should be used instead?

Originally posted by @hroncok in #126354 (comment)

Linked PRs

• gh-127174: add some advice for asyncio.get_event_loop replacements #127640

[graingert]

Currently:

import asyncio

async def amain():
    await asyncio.sleep(0)
    print("slept")

asyncio.get_event_loop().run_until_complete(amain())

Will fail on 3.14

Code should use

import asyncio

async def amain():
    await asyncio.sleep(0)
    print("slept")

asyncio.run(amain())

Instead

It may be that a user will need to interleave synchronous code with calls into and back out of the event loop in which case with asyncio.Runner() as runner: runner.run(...) should be used

It is not correct to simply replace asyncio.get_event_loop() with asyncio.new_event_loop() because there's a number of important teardown steps that asyncio.Runner performs. Making this change will appear to work, but will silently cause problems

[asvetlov]

Sorry, I've missed. What part of docs should be corrected?

[graingert]

It's the what's new section

[kumaraditya303]

@graingert Would you like to send a PR for it? I'll review it.

[graingert]

I'll give it a go, feel free for someone else to do it if it's not done by next week