[Python-Dev] \G (match last position) regex operator non-existant in python? (original) (raw)

Peter Ludemann pludemann at google.com
Sat Oct 28 20:09:48 EDT 2017

On 28 October 2017 at 16:48, Steven D'Aprano <steve at pearwood.info> wrote:

On Sun, Oct 29, 2017 at 12:31:01AM +0100, MRAB wrote:

> Not that I'm planning on making any further additions, just bug fixes > and updates to follow the Unicode updates. I think I've crammed enough > into it already. There's only so much you can do with the regex syntax > with its handful of metacharacters and possible escape sequences... What do you think of the Perl 6 regex syntax? https://en.wikipedia.org/wiki/Perl6rules#ChangesfromPerl5

​If you're going to change the notation, why not use notations similar to what linguists use for FSTs? These allow building FSTs (with operations such as adding/subtracting/composing/projecting FSTs) with millions of states — and there are some impressive optimisers for them also, so that encoding a dictionary with inflections is both more compact and faster than a hash of just the words without inflections. Some of this work is open source, but I haven't kept up with it.

If you're interested, you can start here: http://web.stanford.edu/~laurik/​ http://web.stanford.edu/~laurik/publications/TR-2010-01.pdf http://web.stanford.edu/group/cslipublications/cslipublications/site/1575864347.shtml etc.

;)

-- Steve

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