[Distutils] [RFC] PEP 345 and PEP 386 updates

[M.-A. Lemburg]

Tarek Ziadé wrote:
> On Tue, Oct 20, 2009 at 5:20 PM, M.-A. Lemburg <mal at egenix.com> wrote:
>>>> The micro-language should provide a limited number of
>>>> variables to use on the conditions:
>>>>
>>>> python_version = sys.version
>>>> sys_platform = sys.platform
>>>
>>> If we adopt such a micro-language (I'm reserving judgment until I've
>>> had more time to read the relevant PEPs carefully), I'd rather see the
>>> names match what's in the Python runtime more closely, probably only
>>> avoiding the call syntax.
>>
>> We could do that as well, yes.
> 
> +1 on close names + no call syntax
> 
> but, notice that "python_version" here is:   "%s.%s" %
> sys.version_info[0], sys.version_info[1]
> 
> thats why we came up with that name, to disinguish it from sys.version
> (that contains more stuff)

I think we do need the full version here, so perhaps using
sys.version.split()[0] would be better or simply the full
version string and then have conditions use >=, <=, <, >
only (ie. not =, since that would likely never match).

Note that packages do sometimes need to know that a certain
Python patch level release is installed (e.g. Zope often has
had this need) and a proper dependency checker would have to
detect a possible mismatch.

-- 
Marc-Andre Lemburg
eGenix.com

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