On Friday, October 7, 2016 at 10:47:55 AM UTC-7, John H Palmieri wrote:
>
> TypeError: Error when calling the metaclass bases
> metaclass conflict: the metaclass of a derived class must be a
> (non-strict) subclass of the metaclasses of all its bases
>
Yes, python doesn't support multiple meta
On Friday, October 7, 2016 at 6:21:45 PM UTC-7, Nils Bruin wrote:
>
> On Friday, October 7, 2016 at 10:47:55 AM UTC-7, John H Palmieri wrote:
>>
>> TypeError: Error when calling the metaclass bases
>> metaclass conflict: the metaclass of a derived class must be a
>> (non-strict) subclass of
On Saturday, October 8, 2016 at 8:43:33 AM UTC-7, John H Palmieri wrote:
>
>
> What are all of the drawbacks?
>
> The ones I am aware of:
- the construction parameters need to be cached. That might have lifetime
implications for them.
- construction parameters need to be processed for hashing et
On Saturday, October 8, 2016 at 12:12:30 PM UTC-7, Nils Bruin wrote:
>
> On Saturday, October 8, 2016 at 8:43:33 AM UTC-7, John H Palmieri wrote:
>>
>>
>> What are all of the drawbacks?
>>
>> The ones I am aware of:
> - the construction parameters need to be cached. That might have lifetime
> imp
Hi Jeroen,
On 2016-10-10, Jeroen Demeyer wrote:
> Try this:
>
> sage: from sage.misc.inherit_comparison import
> InheritComparisonClasscallMetaclass
> sage: class A(Element, UniqueRepresentation):
> : __metaclass__ = InheritComparisonClasscallMetaclass
In other words, we have custom mad
Hi Jeroen,
On 2016-10-10, Jeroen Demeyer wrote:
> On 2016-10-10 10:47, Simon King wrote:
>> The meta-metaclass would take the
>> atomic metaclasses appearing in the bases of a class definition "Foo",
>> and would automatically/dynamically create a composed metaclass, that
>> combines all the feat
Hi Jeroen,
On 2016-10-10, Simon King wrote:
>> The metaclass of B1 is responsible for constructing the class X (in
>> particular, the metaclass of B1 can decide the metaclass of X). In
>> Python 3, the metaclass of X is resolved by a hard-coded algorithm
>> _PyType_CalculateMetaclass and then
Hi Jeroen,
On 2016-10-10, Jeroen Demeyer wrote:
> Maybe I'm misunderstanding you, but what I wanted to say is: Python 3
> doesn't have any place to hook a custom metaclass.
Is there a way to have a metaclass similar to our ClasscallMetaclass at
all, in Python3?? I just tested, having
class Cla
["Followup-To:" nach gmane.comp.mathematics.sage.devel gesetzt.]
On 2016-10-11, Simon King wrote:
> Hi Jeroen,
>
> On 2016-10-10, Jeroen Demeyer wrote:
>> Maybe I'm misunderstanding you, but what I wanted to say is: Python 3
>> doesn't have any place to hook a custom metaclass.
>
> Is there a wa
On Sat, 8 Oct 2016, Nils Bruin wrote:
What are all of the drawbacks?
The ones I am aware of:
Also random testing for a hypotheses is hard. I can generate infinitely
many random graphs in a loop and try to found a counterexample, but the
same does not apply to posets.
--
Jori Mäntysa
On 2016-10-10 10:47, Simon King wrote:
The meta-metaclass would take the
atomic metaclasses appearing in the bases of a class definition "Foo",
and would automatically/dynamically create a composed metaclass, that
combines all the features of the given atomic metaclasses and would
serve as the me
On 2016-10-10 17:31, Simon King wrote:
I just tested that in the current Sage development version my
proof-of-concept would still work.
But still Python 2, right?
And looking at
_PyType_CalculateMetaclass, I don't see why it wouldn't work in Python3.
Maybe I'm misunderstanding you, but what
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