Robert, this is definitely a good idea, but I would object it being
enabled by default. If it is enabled in a way like the current
'__weakref__' way, then that would be fine (IMHO , and once again,
explicit is better than implicit). And finally, if a user want to do
himself the full implementation like in my example, then Cython should
just ignore its 'default' way and respect user implementation.
On 5/27/08, Robert Bradshaw <[EMAIL PROTECTED]> wrote:
> On May 27, 2008, at 2:27 PM, Lisandro Dalcin wrote:
>
> > On 5/27/08, Eric Jonas <[EMAIL PROTECTED]> wrote:
> >> To start with, this is awesome. Thank you so much!
> >>
> >> Next question: What if I want MyPair to have a zero-argument
> >> constructor? (Well, besides self, that is). If I do:
> >>
> >> class MyPair(pair):
> >> def __init__(self):
> >> pass
> >>
> >> then I get "TypeError: ('__init__() takes exactly 1 argument (3
> >> given)".
> >> Does this mean that derived types must always have constructors
> >> with the
> >> same number (or more) than their base type?
> >
> > Yes and No. The problem is that different pickle protocols assume and
> > do different things. Give me some minute, I'll try to figure out
> > what's going on. And yes, you are right, this is a real crap if you
> > want so support in a easy way all pickle protocols, plus class
> > inheritance.
>
>
> On this note, I think Cython should be able to provide a default
> __reduce__ that will "just work" for cdef classes, the way normal
> pickling works in Python without having to think about it. Of course,
> one should always be able to override it manually, and if the class
> has specially-typed members than it may take a bit more work.
>
>
> - Robert
>
>
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--
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
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