The regex library I meant is that very one. Named lists are a feature there but not in cpython's or pypy's re.
On Monday, August 25, 2014, Laura Creighton <l...@openend.se> wrote: > In a message of Mon, 25 Aug 2014 03:20:55 -0400, Mike Kaplinskiy writes: > >Hey folks, > > > >One of the projects I'm working on in CPython is becoming a little CPU > >bound and I was hoping to use pypy. One problem though - one of the pieces > >uses the regex library (which claims to be CPython's re-next). Running > >regex through cpyext works, but is deadly slow. > > > >>From reading the docs it seems like I have a few options: > > - rewrite all of regex in Python - seems like a bad idea > > - rewrite regex to be non-python specific & use cppyy or cffi to > interface > >with it. I actually looked into this & unfortunately the CPython API seems > >quite deep in there. > > - get rid of the dependency somehow. What I'm missing are named lists > >(basically "L<a>", a=["1","2"] will match 1 or 2). Unfortunately creating > >one really long re string is out of the question - I have not seen > >compile() finish with that approach. Writing a custom DFA could be on the > >table, but I was hoping to avoid that error prone step. > > - somehow factor out the part using regex and keep using CPython for it. > > - add the missing functionality to pypy's re. This seems like the path of > >least resistance. > > > >I've started looking into the sre module and it looks like quite a few > bits > >(parsing & compiling to byte code mostly) are reused from CPython. I would > >have to change some of those bits. My question is then - is there any hope > >of getting these changes upstream then? Do stdlib pieces have a "no touch" > >policy? > > > >Thanks, > >Mike. > > Do you know about > https://pypi.python.org/pypi/regex > > If I were you, I would try to get the behaviour you want put into the > new replacement version -- which would, of course, be easiest if you > contributed the code. Then we can see about having pypy do the same ... > > Laura >
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