[Python-ideas] Introduce collections.Reiterable

[Neil Girdhar]

We're not talking about deprecating __getitem__.  We're talking about
deprecating the "sequence protocol" whereby iter(obj) falls back to calling
__getitem__ when an object doesn't have __iter__.  No one is talking about
removing __getitem__!

Neil


On Sat, Sep 21, 2013 at 2:36 AM, Ethan Furman <ethan at stoneleaf.us> wrote:

> On 09/20/2013 11:21 PM, Neil Girdhar wrote:
>
>> No one suggested removing __getitem__.  Some people have suggested
>> deprecating (without removing) the sequence protocol.
>>   Do you know of any object that relies on the sequence protocol?  That
>> is, that implements __getitem__ without
>> implementing __iter__ (or using a mixin like collections.Sequence to
>> provide __iter__)?
>>
>
> The goal of deprecation is removal.
>
> Any item that supports index access, such as lists, tuples, and
> dictionaries, needs __getitem__.  Iteration is not the only way to access
> an iterable object.
>
>
> --
> ~Ethan~
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