[Python-3000] Making more effective use of slice objects in Py3k

[Aahz]

On Tue, Aug 29, 2006, Guido van Rossum wrote:
> On 8/29/06, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
>> Guido van Rossum wrote:
>>>
>>> Having views in a library module alleviates many of my objections.
>>> While I still worry that it will be overused, deque doesn't seem to
>>> be overused, so perhaps I should relax.
>>
>> Another thought is that there will already be ways in which Py3k
>> views could lead to inefficiencies if they're not used carefully. A
>> keys() view of a dict, for example, will keep the values of the dict
>> alive as well as the keys, unlike the existing keys() method.
>
> Right; but I don't expect that such a keys() view will typically have
> a lifetime longer than the dict. 

That's true only for newer code that correctly uses sets instead of
dicts -- but we've had this argument before.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are, by
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