Is there a maximum length of a regular expression in python?
roy at panix.com
Fri Jan 20 17:47:50 EST 2006
In article <iudAf.15405$Yu.7291 at newssvr27.news.prodigy.net>,
Bryan Olson <fakeaddress at nowhere.org> wrote:
> Roy Smith wrote:
> > olekristianvillabo at gmail.com wrote:
> >>I have a regular expression that is approximately 100k bytes. (It is
> >>basically a list of all known norwegian postal numbers and the
> >>corresponding place with | in between. I know this is not the intended
> >>use for regular expressions, but it should nonetheless work.
> >>the pattern is
> >>ur'(N-|NO-)?(5259 HJELLESTAD|4026 STAVANGER|4027 STAVANGER........|8305
> >>The error message I get is:
> >>RuntimeError: internal error in regular expression engine
> > I don't know of any stated maximum length, but I'm not at all surprised
> > this causes the regex compiler to blow up. This is clearly a case of regex
> > being the wrong tool for the job.
> Does no one care about an internal error in the regular expression
I think the most that could be said here is that it should probably produce
a better error message.
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