[Python-ideas] Introduce collections.Reiterable
mistersheik at gmail.com
Sat Sep 21 08:21:21 CEST 2013
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__)?
On Sat, Sep 21, 2013 at 1:54 AM, Ethan Furman <ethan at stoneleaf.us> wrote:
> On 09/20/2013 09:20 PM, Neil Girdhar wrote:
>> I can humbly suggest why Python would deprecate the sequence protocol:
>> there "should be one obvious way" to answer
>> iter(), and in my opinion that's the __iter__() method. I considered
>> infinite iterators, and if you happen to have
>> __getitem__ written, you can trivially write an __iter__ function as
> 1) One Obvious Way != Only One Way (we can have both)
> 2) Deprecating (and removing) __getitem__ will break lots of code. It's
> not going to happen.
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