[Python-ideas] clear() method for lists

Nick Coghlan ncoghlan at gmail.com
Fri Feb 12 11:22:54 CET 2010

Masklinn wrote:
> On 12 Feb 2010, at 10:58 , Nick Coghlan wrote:
>> George Sakkis wrote:
>>> Speaking of new potential list methods, how about list.get(index,
>>>  default=None) ala dict.get ? I'm sure this has must have come up
>>> at some point but can't find it ATM.
>> I believe it runs afoul of the moratorium, but a getitem() builtin
>> might be a better idea (since it would then work for any class that
>> implements __getitem__).
> Maybe just extending operator.itemgetter with a "default" kwarg?
> Wouldn't run afoul the moratorium, and would be quite a nice
> extension to itemgetter.

Yeah, a kw-only arg for itemgetter and attrgetter could definitely work.
It would be somewhat clunky to use though.

> Though I'm not sure it's a very good idea for lists. Semantically,
> lists are to be iterated, not really to be indexed.

Using short lists as record sets happens all the time (especially with
things like str.split and other parsing operations that build up their
results incrementally).


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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