[Distutils] "Stable" versions

[Ian Bicking]

I've received a request that pip be able to be restricted to "stable" 
versions.  It was suggested some kind of --alpha-ok or --beta-ok option, 
but this seems crude.  I'd rather have it be part of the requirement. 
Maybe Package==stable?  But there's also reason to do something like 
Package>=2.0,stable.  So while pkg_resources can parse Package==stable 
easily enough, it's not by itself really expressive enough (I suppose 
Package>=2.0,==stable actually works okay).

Also, there needs to be a definition of what versions are "stable".  And 
maybe a distinction between beta/rc and development, though I'm less 
worried about that.  Are there definitions of this?  Does zc.buildout do 
this?

-- 
Ian Bicking : ianb at colorstudy.com : http://blog.ianbicking.org