On Tue, Apr 29, 2008 at 11:42 AM, <[EMAIL PROTECTED]> wrote:
>
> Alexander> The quick hack to request a version, good to use in the
> Alexander> interpreter or a "throw-away" script:
>
> Alexander> import pkg_resources
> Alexander> pkg_resources.require('SQLAlchemy==0.4.5')
> Alexander> import sqlalchemy
>
> Alexander> This works when the directory that SQLAlchemy-0.4.5-py2.4.egg
> Alexander> is in is listed in sys.path.
>
> Thanks, however that raises a VersionConflict exception:
>
>
> >>> pkg_resources.require('SQLAlchemy==0.4.5')
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> File
> "/opt/app/g++lib6/python-2.4.5/lib/python2.4/site-packages/setuptools-0.6c7-py2.4.egg/pkg_resources.py",
> line 626, in require
> needed = self.resolve(parse_requirements(requirements))
> File
> "/opt/app/g++lib6/python-2.4.5/lib/python2.4/site-packages/setuptools-0.6c7-py2.4.egg/pkg_resources.py",
> line 528, in resolve
> raise VersionConflict(dist,req) # XXX put more info here
> pkg_resources.VersionConflict: (SQLAlchemy 0.3.3
>
> (/opt/app/g++lib6/python-2.4.5/lib/python2.4/site-packages/SQLAlchemy-0.3.3-py2.4.egg),
> Requirement.parse('SQLAlchemy==0.4.5'))
>
> I need 0.3.3 to be the default version, but need to be able to import 0.4.5
> for testing.
Ah. Yes. I install everything --multi-version so I have forgotten
about this issue with the default working set. Maybe
__requires__ = ['SQLAlchemy==0.4.5']
import pkg_resources
import sqlalchemy
will help pkg_resources create the desired WorkingSet.
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