[Python-Dev] [NPERS] Re: a feature i'd like to see in python #2: indexing of match objects (original) (raw)

Ben Wing ben at 666.com
Tue Dec 5 10:02:39 CET 2006

Fredrik Lundh wrote:

Ka-Ping Yee wrote:

I'd say, don't pretend m is a sequence. Pretend it's a mapping. Then the conceptual issues go away. almost; that would mean returning KeyError instead of IndexError for groups that don't exist, which means that the common pattern a, b, c = m.groups() cannot be rewritten as , a, b, c = m which would, perhaps, be a bit unfortunate. taking everything into account, I think we should simply map getitem to group, and stop there. no len(), no slicing, no sequence or mapping semantics. if people want full sequence behaviour with len and slicing and iterators and whatnot, they can do list(m) first. i'm ok either way -- that is, either with the proposal i previously published, or with this restricted idea.

ben

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