[Distutils] setuptools extras_require

[Phillip J. Eby]

At 08:28 PM 12/10/2006 +0100, Elvelind Grandin wrote:
>Is there any way to exclude packages in extras_require as opposed to
>just include them. In Turbogears we have Sqlobject in by default. but
>if the extra "future" is used it should drop SO and install sqlalchemy
>instead.

Not currently, no.  Do you have any suggestions as to how this might be 
spelled in the requirements API?