Guido van Rossum wrote:
On Fri, Jun 22, 2012 at 12:24 PM, Yury Selivanov
<yselivanov...@gmail.com> wrote:
On 2012-06-22, at 3:18 PM, Guido van Rossum wrote:
On Fri, Jun 22, 2012 at 12:10 PM, Yury Selivanov
<yselivanov...@gmail.com> wrote:
Yes, I meant optional. Would 'name(arg1, *, [arg2])' be better?
Hardly, because that's not valid syntax. I'd write name(arg1, *,
arg2=<default>).
Like
replace(*, name=<default>, kind=<default>, default=<default>,
annotation=<default>) -> Parameter
or
replace(*, name=<optional>, kind=<optional>, default=<optional>,
annotation=<optional>) -> Parameter
Either one's an improvement, but you'll have to explain at the top of
the PEP what you intend this notation to mean. I'd go with <optional>
since the key thing here seems to be that various keywords, when not
specified, mean that nothing changes. OTOH in some places you can
probably write "foo=Signature.empty" (etc.).
Parameter names that follow '*' in the signature are not optional
(unless that has changed since 3.2). In other words, the above
signature requires that name, kind, default, and annotation be specified
by name *and* be given values when replace is called)
~Ethan~
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