On Jun 21, 2006, at 5:11 PM, Phillip J. Eby wrote:
> """Requirement strings basically consist of a distribution name, an
> optional list of "options" (more on this in a moment), and a comma-
> separated list of zero or more version conditions. Version
> conditions basically specify ranges of valid versions, using
> comparison operators. The version conditions you supply are sorted
> into ascending version order, and then scanned left to right until
> the package's version falls between a pair of > or >= and < or <=
> conditions, or exactly matches a == or != condition."""
I don't think this is right. :)
If I have a collection of eggs like:
/home/jim/tmp/dist:
used 92 available 41345796
-rw-rw-r-- 1 jim jim 671 Jun 19 17:43 demoneeded-1.0-py2.4.egg
-rw-rw-r-- 1 jim jim 672 Jun 19 17:46 demoneeded-1.1-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.2-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.3-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.4-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.5-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.6-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.7-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.8-py2.4.egg
-rw-rw-r-- 1 jim jim 673 Jun 19 17:46 demoneeded-1.9-py2.4.egg
Then:
>>> import pkg_resources
>>> e = pkg_resources.Environment(['tmp/dist'])
>>> ws = pkg_resources.WorkingSet()
>>> ws.resolve([pkg_resources.Requirement.parse('demoneeded !=1.1,
<1.4')], e)
[demoneeded 1.3 (/home/jim/tmp/dist/demoneeded-1.3-py2.4.egg)]
When scanning left to right, 1.9 matches !=1.1, so it should match and,
since it is the highest version, it should be returned. Either your
description
of the algorithm is incorrect or I'm misunderstanding it.
Jim
--
Jim Fulton mailto:[EMAIL PROTECTED] Python
Powered!
CTO (540) 361-1714
http://www.python.org
Zope Corporation http://www.zope.com http://www.zope.org
_______________________________________________
Distutils-SIG maillist - [email protected]
http://mail.python.org/mailman/listinfo/distutils-sig
