On 11 June 2018 at 04:35, Juancarlo Añez wrote:
>
> As the PEP author, that's your job.
>>
>
> I started writing the PEP, and I found an interesting example:
>
> if not (m := re.match(r'^(\d+)-(\d+)$', identifier):
> raise ValueError('f{identifier} is not a valid identifier')
> pr
> As the PEP author, that's your job.
>
I started writing the PEP, and I found an interesting example:
if not (m := re.match(r'^(\d+)-(\d+)$', identifier):
raise ValueError('f{identifier} is not a valid identifier')
print(f'first part is {m.group(1)}')
print(f'first part is {m
On Sun, Jun 10, 2018 at 08:08:13AM -0400, Juancarlo Añez wrote:
> > while (condition := expression) as flag:
> > ...
> >
>
> Ah! Are the parenthesis necessary there?
It's your PEP, you tell us.
> > Accepting "while/if as name" would remove much (but not all) of the
> > motivation f
On Sun, Jun 10, 2018 at 10:08 PM, Juancarlo Añez wrote:
>
> There can be cases in which combining both syntaxes is useful:
>
> x = None
> while compute(x := v for v in next_series_value(x)) as comp:
> ...
> x = comp
Why not just:
while comp := compute(x := v for v in next_series_value(x)
> The only difference is that the `except` block implicitly unbinds the
> variable when the block ends.
>
Mmmm. Good to know, because that means that the semantics are the same,
except...
>
> while (condition := expression) as flag:
> ...
>
Ah! Are the parenthesis necessary there?
On Sat, Jun 09, 2018 at 09:17:37AM -0400, Juancarlo Añez wrote:
> > Do you mean the context manager semantics of with statements? As in,
> > calling the __enter__ and __exit__ method?
> >
>
> No. Just the scope of the variables introduced, which is different in `with
> as` and `except as`.
They a
> Do you mean the context manager semantics of with statements? As in,
> calling the __enter__ and __exit__ method?
>
No. Just the scope of the variables introduced, which is different in `with
as` and `except as`.
> Please make sure you are very familiar with PEP 572 before you do, and
> expect
On Sat, Jun 09, 2018 at 08:43:47AM -0400, Juancarlo Añez wrote:
> Hello @here,
>
> Is there a guide about writing (and publishing) PEPs?
https://www.python.org/dev/peps/pep-0001/
> I'd like to write one on `while expre as v: ...` using the context
> semantics of `with expr as v` (not `except E
On 2018-06-09 14:43, Juancarlo Añez wrote:
Is there a guide about writing (and publishing) PEPs?
https://www.python.org/dev/peps/pep-0001/
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Hello @here,
Is there a guide about writing (and publishing) PEPs?
I'd like to write one on `while expre as v: ...` using the context
semantics of `with expr as v` (not `except E as e`).
Cheers,
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