Finding way around ABCs (was What for -- for? (was A bug?))

Ian Kelly ian.g.kelly at gmail.com
Thu Oct 30 18:11:22 CET 2014


On Thu, Oct 30, 2014 at 11:09 AM, Ian Kelly <ian.g.kelly at gmail.com> wrote:
> On Thu, Oct 30, 2014 at 11:01 AM, Rustom Mody <rustompmody at gmail.com> wrote:
>> On Wednesday, October 29, 2014 11:49:27 AM UTC+5:30, Zachary Ware wrote:
>>> On Wed, Oct 29, 2014 at 1:11 AM, Rustom Mody wrote:
>>> > On Wednesday, October 29, 2014 11:10:06 AM UTC+5:30, Zachary Ware wrote:
>>> >> Of course, that's 3 (progressively shorter) loops to get the names of
>>> >> the ABCs of a class compared to 1 (fairly short in the first place)
>>> >> loop for a map of relationships to all available ABCs, but optimizing
>>> >> such a toy as this would just be an exercise in futility :)
>>> >
>>> > Not so.
>>> >
>>> > The charm of introspection is that the introspection
>>> > itself can be introspected.
>>> > For that to be convincing there needs to be a good combo
>>> > of clarity and succinctness.  In particular why not reduce
>>> > the two functions to one?
>>> >
>>> > def get_abc_names(cls):
>>> >     return [abc.__name__ for abc in abcs if issubclass(cls,abc)]
>>>
>>> Well, it depends on what you actually want, the spec has been a bit fuzzy ;)
>>
>> Thanks for this much -- its helpful.
>> Regarding ABCs -- is there a central documentation for them:
>>
>> "What exactly is a sequence or iterable or etc protocol?"
>>
>> This information seems to be strewn all over the place but systematically.
>
> Maybe the glossary?

Also the documentation for the collections.abc and numbers modules:

https://docs.python.org/3/library/collections.abc.html
https://docs.python.org/3/library/numbers.html



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