Definitive guide for Regex

[Shaozhong SHI]

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?

Regards,

David

On Thu, 30 Sept 2021 at 22:02, Barry Scott <barry at barrys-emacs.org> wrote:

>
>
> > On 30 Sep 2021, at 19:35, dn via Python-list <python-list at python.org>
> wrote:
> >
> > On 01/10/2021 06.16, Barry Scott wrote:
> >>
> >>
> >>> On 30 Sep 2021, at 12:29, Shaozhong SHI <shishaozhong at 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
>