[Python-3000] Making more effective use of slice objects in Py3k (original) (raw)

Guido van Rossum guido at python.org
Wed Aug 30 02:59:00 CEST 2006

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. For substrings OTOH that's quite common (parsing etc.).

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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