Regular Expression bug?

[jose isaias cabrera]

On Thu, Mar 2, 2023 at 8:35 PM <avi.e.gross at gmail.com> wrote:
>
> It is a well-known fact, Jose, that GIGO.
>
> The letters "n" and "m" are not interchangeable. Your pattern fails because you have "pn" in one place and "pm" in the other.

It is not GIGO. pm=project manager. pn=project name. I needed search()
rather than match().

>
> >>> s = "pn=jose pn=2017"
> ...
> >>> s0 = r0.match(s)
> >>> s0
> <re.Match object; span=(0, 15), match='pn=jose pn=2017'>
>
>
>
> -----Original Message-----
> From: Python-list <python-list-bounces+avi.e.gross=gmail.com at python.org> On Behalf Of jose isaias cabrera
> Sent: Thursday, March 2, 2023 8:07 PM
> To: Mats Wichmann <mats at wichmann.us>
> Cc: python-list at python.org
> Subject: Re: Regular Expression bug?
>
> On Thu, Mar 2, 2023 at 2:38 PM Mats Wichmann <mats at wichmann.us> wrote:
> >
> > On 3/2/23 12:28, Chris Angelico wrote:
> > > On Fri, 3 Mar 2023 at 06:24, jose isaias cabrera <jicman at gmail.com>
> wrote:
> > >>
> > >> Greetings.
> > >>
> > >> For the RegExp Gurus, consider the following python3 code:
> > >> <code>
> > >> import re
> > >> s = "pn=align upgrade sd=2023-02-"
> > >> ro = re.compile(r"pn=(.+) ")
> > >> r0=ro.match(s)
> > >>>>> print(r0.group(1))
> > >> align upgrade
> > >> </code>
> > >>
> > >> This is wrong. It should be 'align' because the group only goes up-to
> > >> the space. Thoughts? Thanks.
> > >>
> > >
> > > Not a bug. Find the longest possible match that fits this; as long as
> > > you can find a space immediately after it, everything in between goes
> > > into the .+ part.
> > >
> > > If you want to exclude spaces, either use [^ ]+ or .+?.
> >
> > https://docs.python.org/3/howto/regex.html#greedy-versus-non-greedy
>
> This re is a bit different than the one I am used. So, I am trying to match
> everything after 'pn=':
>
> import re
> s = "pm=jose pn=2017"
> m0 = r"pn=(.+)"
> r0 = re.compile(m0)
> s0 = r0.match(s)
> >>> print(s0)
> None
>
> Any help is appreciated.
> --
> https://mail.python.org/mailman/listinfo/python-list
>


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