Feature or enhancement

Proposal:

Hello - I’m with the Austin Common Standards Revision Group - the joint technical working group established to develop and maintain the core open systems interfaces that are the POSIX™ 1003.1 (and former 1003.2) standards, ISO/IEC 9945, and the core of the Single UNIX Specification.

We have had a request to unify/rationalize the regex behaviors for “anchor at string beginning” (^ is the closest in POSIX) and “anchor at string end” ($ is the closest in POSIX). Adescription of this problem in depth can be found here and atable that scopes the varied solutions across varying languages can be found here.

Our working group has come to the conclusion that \A and \z are widely implemented across many ecosystems and are the most “standard” solution to the issue. We are asking if the Python community would consider adding “\z” as a synonym for “\Z” in their regex lexicon.

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/proposal-add-z-as-a-synonym-for-z-in-python-res-for-standardization/90378/1

Linked PRs

• gh-133306: Support \z as a synonym for \Z in regular expressions #133314
• gh-133306: Use \z instead of \Z in regular expressions in the stdlib #133337
• gh-133306: Use \z instead of \Z in fnmatch.translate() and glob.translate() #133338