["python","buildout"]
How can I specify library versions in setup.py?

In my setup.py file, I've specified a few libraries needed to run my project: setup( # ... install_requires = [ 'django-pipeline', 'south' ] ) How can I specify required versions of these libraries?
I'm not sure about buildout, however, for setuptools/distribute, you specify version info with the comparison operators (like ==, >=, or <=). For example: install_requires = ['django-pipeline==1.1.22', 'south>=0.7'] See the Python packaging documentation