[Python-Dev] PEP 560: bases classes / confusion

[Koos Zevenhoven]

On Thu, Nov 16, 2017 at 6:28 PM, brent bejot <brent.bejot at gmail.com> wrote:

> Hello all,
>
> Noticed that "MRO" is not actually defined in the PEP and it seems like it
> should be.  Probably in the Performance section where the abbreviation is
> first used outside of a function name.
>
>
​I don't think it will hurt if I suggest that __bases__, bases, "original
bases"​, mro, __orig_bases__, MRO, __mro__ and "concatenated mro entries"
are all defined as synonyms of each other, except with different meanings
:-)

––Koos



> -Brent
>
> On Thu, Nov 16, 2017 at 7:22 AM, Ivan Levkivskyi <levkivskyi at gmail.com>
> wrote:
>
>> On 16 November 2017 at 07:56, Nick Coghlan <ncoghlan at gmail.com> wrote:
>>
>>> On 16 November 2017 at 04:39, Ivan Levkivskyi <levkivskyi at gmail.com>
>>> wrote:
>>>
>>>> Nick is exactly right here. Jim, if you want to propose alternative
>>>> wording, then we could consider it.
>>>>
>>>
>>> Jim also raised an important point that needs clarification at the spec
>>> level: given multiple entries in "orig_bases" with __mro_entries__ methods,
>>> do all such methods get passed the *same* orig_bases tuple? Or do they
>>> receive partially resolved ones, such that bases listed before them have
>>> already been resolved to their MRO entries by the time they run.
>>>
>>>
>>>
>> Yes, they all get the same initial bases tuple as an argument. Passing
>> updated ones will cost a bit more and I don't think it will be needed (in
>> the worst case a base can resolve another base by calling its
>> __mro_entries__ manually).
>> I will clarify this in the PEP.
>>
>> --
>> Ivan
>>
>>
>>
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>>
>
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-- 
+ Koos Zevenhoven + http://twitter.com/k7hoven +
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