[Python-ideas] Make len() usable on a generator

[Thomas Chaumeny]

I searched this list before I asked and couldn't find anything.

Anyway, I understand from Nick's response that len() is conceived for
collections which have a size computable in constant time (I suppose
structures that maintain some inner attribute to store their length). I
also believe that "length" sounds more like an attribute name than a name
for something which really does some computation ("count" sounds more
appropriate for that). On the other hand, it doesn't seem to be a general
concern not to provide construction which can lead to hidden complexity
cost (like "in" used on a list vs a set).

On Fri, Oct 3, 2014 at 7:05 PM, Stefan Behnel <stefan_ml at behnel.de> wrote:

> Thomas Chaumeny schrieb am 03.10.2014 um 17:09:
> > What do you think ?
>
> You can read the answers in the previous discussion threads on this list
> (and on python-list, and IIRC the py3k list, and maybe python-dev, too)
> that deal with exactly this proposal.
>
> Stefan
>
>
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