[Python-ideas] Proposal: A Reduce-Map Comprehension and a "last" builtin

[Cammil Taank]

I'm not sure if my suggestion for 572 has been considered:

``name! expression``

I'm curious what the pros and cons of this form would be (?).

My arguments for were in a previous message but there do not seem to be any
responses to it.

Cammil

On Fri, 6 Apr 2018, 16:14 Guido van Rossum, <guido at python.org> wrote:

> On Fri, Apr 6, 2018 at 7:47 AM, Peter O'Connor <peter.ed.oconnor at gmail.com
> > wrote:
>
>> Hi all, thank you for the feedback.  I laughed, I cried, and I learned.
>>
>
> You'll be a language designer yet. :-)
>
>
>> However, it looks like I'd be fighting a raging current if I were to try
>> and push this proposal.  It's also encouraging that most of the work would
>> be done anyway if ("Statement Local Name Bindings") thread passes.  So some
>> more humble proposals would be:
>>
>> 1) An initializer to itertools.accumulate
>> functools.reduce already has an initializer, I can't see any controversy
>> to adding an initializer to itertools.accumulate
>>
>
> See if that's accepted in the bug tracker.
>
>
>> 2) Assignment returns a value (basically what's already in the "Statement
>> local name bindings" discussion)
>> `a=f()` returns a value of a
>> This would allow updating variables in a generator (I don't see the need
>> for ":=" or "f() as a") but that's another discussion
>>
>
> Please join the PEP 572 discussion. The strongest contender currently is
> `a := f()` and for good reasons.
>
> --
> --Guido van Rossum (python.org/~guido)
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