[Python-Dev] PEP 572: Assignment Expressions

[Guido van Rossum]

Using 'as' was debated extensively on python-ideas. I don't like it for
several reasons:

- the semantics are subtly different from all other uses of 'as' in Python;
I'd like to reserve 'as' for "not a plain assignment"
- a short word is easier to miss when skimming code than punctuation
- most other languages (Java*, C*) borrow from assignment (name = expr)


On Mon, Apr 23, 2018 at 3:19 PM, Ned Deily <nad at python.org> wrote:

> On Apr 23, 2018, at 18:04, Tim Peters <tim.peters at gmail.com> wrote:
> > However, against "as" is that its current use in "with" statements
> > does something quite different:
> >
> >    with f() as name:
> >
> > does not bind the result of `f()` to `name`, but the result of
> > `f().__enter__()`.  Whether that "should be" fatal, I don't know, but
> > it's at least annoying ;-)
>
> Prior art: COBOL uses "GIVING", as in:
>
>    ADD x, y GIVING z
>
> No need to re-invent the wheel ;)
>
> --
>   Ned Deily
>   nad at python.org -- []
>
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-- 
--Guido van Rossum (python.org/~guido)
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