> On 1 Oct 2021, at 10:58, Shaozhong SHI <shishaozh...@gmail.com> wrote:
>
> Hi, Barry,
>
> In cases of automating checking, validation and producing reports in the
> context of data quality control and giving specific feedback to production
> teams, regex is perhaps the only way.
>
> Perhaps, we can give each element of data specifications a name, that are
> associated with a regex value, so that we can automate checking and reporting
> on data sets. We can report on which row of records meet specification and
> requirements and which one is not. And, report on which cell needs to be
> corrected should a row is found not meeting specification and requirements.
>
> What do you think?
It depends a lot of the details of that you have to validate. There is not
enough to guess at a design.
It may well be that uses regex's is a good way to do it.
Barry
>
> Regards,
>
> David
>
> On Thu, 30 Sept 2021 at 22:02, Barry Scott <ba...@barrys-emacs.org
> <mailto:ba...@barrys-emacs.org>> wrote:
>
>
> > On 30 Sep 2021, at 19:35, dn via Python-list <python-list@python.org
> > <mailto:python-list@python.org>> wrote:
> >
> > On 01/10/2021 06.16, Barry Scott wrote:
> >>
> >>
> >>> On 30 Sep 2021, at 12:29, Shaozhong SHI <shishaozh...@gmail.com
> >>> <mailto:shishaozh...@gmail.com>> wrote:
> >>>
> >>> Dear All,
> >>>
> >>> I am trying to look for a definitive guide for Regex in Python.
> >>> Can anyone help?
> >>
> >> Have you read the python docs for the re module?
> >
> >
> > I learned from Jeffrey Friedl's book "Mastering Regular Expressions",
> > but that was in a land far away, last century, and under a different
> > language (and the original version - I see it's now up to its third
> > edition).
> >
> > Despite their concise exercise of power (and the fact that in my
> > Python-life I've never been put into a corner where I absolutely must
> > use one), I'm no longer a fan...
>
> Agreed, regex is the last tool I reach for in python code.
> I find I use split() a lot to break up strings for processing.
> But there are cases where a regex is the best tool for a particular job
> and I then use the re module. But it costs in maintainability.
>
> I speak as the author of a regex engine and know how to write scary
> regex's when the need arises.
>
> Barry
>
>
> > --
> > Regards,
> > =dn
> > --
> > https://mail.python.org/mailman/listinfo/python-list
> > <https://mail.python.org/mailman/listinfo/python-list>
> >
>
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