Forgot the link: https://packaging.pypa.io/en/latest/version/
> On Sep 16, 2014, at 7:02 AM, Donald Stufft <don...@stufft.io> wrote: > > Specifiers are defined in PEP 440 (the >=1.0 parts), however PEP 426 combines > those with the package names to get “foo >=1.0”. The packaging library > implements > the specifier part. > >> On Sep 16, 2014, at 6:59 AM, Paul Moore <p.f.mo...@gmail.com >> <mailto:p.f.mo...@gmail.com>> wrote: >> >> I feel as though I must be missing something obvious, but is there an >> actual specification of the syntax and semantics of a requirement >> anywhere? I've scanned through the PEP, and while there is a spec for >> the environment marker mini-language, there isn't one for a >> requirement. (As a check I hadn't missed anything obvious, I did a >> text search for the operator ">=" which *is* a valid operator in a >> requirement, and it's not present in a syntax definition or anything >> equivalent. >> >> I ask because I'm looking for a way to find a way of matching a set of >> package/version details against a requirement, and I was coming up >> blank. So I was going to write my own, and then I found that there's >> no spec :-( >> >> Surely having a spec for a requirement has to be part of the sign-off >> requirements for Metadata 2.0? >> >> Digging a bit further, there is (of course, doh!) the pkg_resources >> requirement parser. But even if that is definitive, I think it should >> be integrated into the Metadata 2.0 spec, or at the very least >> referenced from there (and just having a reference risks the >> possibility of setuptools accidentally making changes outside of the >> PEP process). >> >> Paul >> >> [1] Pip's code is too complex to factor out the bits I want, and >> distlib's version matcher seems to support a different syntax if the >> docs are correct. >> _______________________________________________ >> Distutils-SIG maillist - Distutils-SIG@python.org >> <mailto:Distutils-SIG@python.org> >> https://mail.python.org/mailman/listinfo/distutils-sig >> <https://mail.python.org/mailman/listinfo/distutils-sig> > > --- > Donald Stufft > PGP: 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA > > _______________________________________________ > Distutils-SIG maillist - Distutils-SIG@python.org > https://mail.python.org/mailman/listinfo/distutils-sig --- Donald Stufft PGP: 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA
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