[Python-Dev] Proposing PEP 345 : Metadata for Python Software Packages 1.2

[Tres Seaver]

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Tarek Ziadé wrote:
> 2009/12/28 "Martin v. Löwis" <martin at v.loewis.de>:
>>> I think Antoine's proposal is good (using the range when "2.5" is
>>> used, and using 2.5.0 when explicitely
>>> needed), and fixes Martin's concerns.
>>>
>>> So I would be in favor of removing ~= and using Antoine's rule;
>> So specifying 2.5 would be a short-hand for *what*?
> 
> 2.5 would be a shorthand for 2.5.x. So, equivalent to : >=2.5.0, < 2.6.0
> 
> 2.5.0 would be the notation required to describe this specific micro version.
> 
> For third-party projects, the same rule would apply.
> 
> The only particular point is about projects that don't use the .0
> micro notation for the first version of a series.
> In that case, "2.5" will still mean ">=2.5, < 2.6.0"
> 
> IOW, if someone needs a full MAJOR.MINOR.MICRO comparison, he will
> have to explicitely
> tell if by providing a detailed version, even if he needs to fill it
> with some ".0"s
> 
> This will of course be applicable only for PEP 386-compatible
> versions. So for "Requires-Externals", the
> range might not apply (as I stated in the PEP)
> 
> Some examples:
> 
> Requires-Dist: zope.interface (3.1)      ==> any versions that starts
> with 3.1, not including post- or pre- releases
> Requires-Dist: zope.interface (3.1.0)   ==> only 3.1.0

For completeness, isn't this really "any versino which starts with
3.1.0, not including post- or pre- releases"?  That particular pacakge
doesn't use more than a third version component, but there are packages
in the wild which use four.

> Requires-Python: 3                              ==> Python 3 (no
> matter wich one)
> Requires-Python: >=2.6,<3                  ==> Any version of Python
> 2.6.x or 2.7.x (and 2.8.x if it exists one day)
> Requires-Python: 2.6.2                         ==> only Python 2.6.2

Here, the issue is only theoretical:  Python dosn't issue "fourth dot"
releases.



Tres.
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Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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