[Distutils] Two versions of SQLAlchemy side-by-side?

[skip at pobox.com]

    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.

Thx,

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