Fair enough. Whoever writes a PEP for this will need to do the
relevant research and present the arguments in detail. But until
someone's ready to write that PEP, we can continue discussing on the
assumption that if someone finds the async version useful, they'll
speak up.

Paul

On Fri, 12 Feb 2021 at 11:24, Abdulla Al Kathiri
<alkathiri.abdu...@gmail.com> wrote:
>
>
> I am not that familiar with asyncio either. I only wrote a few utility 
> scripts that runs concurrent subprocesses mixed with some blocking functions 
> running in concurrent.ProcessPoolExecutor pool (using 
> asyncio.run_in_executor). That is all what I did with regard asyncio. Your 
> function f2 and my function f2 could be actually normal functions.
> f2 = (x, y) => asyncio.sleep(x + y). f2(3, 7) will just return a coroutine 
> that can be awaited on just fine. To be honest, i don’t even know what the 
> purpose would be with async lambda unless someone with more experience can 
> give us a use case. My guess is that it may be useful to use it as an 
> argument to another async function.
>
> Since we can write shortened normal functions (lambda), shortened generator 
> function (lambda with generator expression), people might ask why Python 
> doesn’t have shortened async function? But maybe that is not a good question 
> to begin with?
> Lambda reminds me of the half life time of isotopes. The other day, I was 
> struggling to teach this to my cousin in elementary school. I just told him 
> to imagine it like def _(args): return something. Assign it to a variable and 
> that variable replaces the underscore. He got it but he found it weird.
> Sent from my iPhone
>
> > On 12 Feb 2021, at 1:41 PM, Paul Moore <p.f.mo...@gmail.com> wrote:
> >
> > I'm not sure what the use cases would be for an async lambda - the key
> > is that it's not named, so the above isn't a good example as it's just
> > as easy to write
> >
> > async def f2:
> >    return asyncio.sleep(x+y)
> >
> > (Excuse any errors here, I'm not that familiar with asyncio).
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