[Distutils] setuptools: Spelling < 3.1.0beta3 ?

Hi- What's the proper way to spell "any version in the 3.0.x series" if a project has a 3.1.0beta3 release? Specifically, CherryPy has both 3.0.2 and 3.1.0beta3 releases. I'd like to depend on any 3.0.x I've tried both 'CherryPy < 3.1' and 'CherryPy < 3.1.0' in my install_requires, and both cause setuptools to pull 3.1.0beta3. I realize I can use 'CherryPy == 3.0.2' but that defeats the "any 3.0.x" idea... --Pete