Oops, I got off list by accident.. On Tue, Apr 14, 2009 at 9:27 PM, Hanno Schlichting wrote:

Hi Tarek,

Tarek Ziadé wrote:

...

On Tue, Apr 14, 2009 at 9:07 PM, Hanno Schlichting wrote:

...

Hi,

I'd like to suggest that distutils metadata should gain a way of specifying compatibility with packages in addition to the requirement of packages.

What are the use cases?

- A package wants to express that it works with both Python 2 and 3.

You may use the classifiers for this use case (Martin has added soem trove classifier for python 2/3)

Right, which restricts this system to Python itself and won't make it possible to use it for other packages. Adding classifiers for each major version of each framework seems tedious.

...

...

- A package wants to express that it works with TurboGears 2 or Plone 4

How it would be different from install_requires (that can point to Plone==3.xx)

Many plug-ins would be compatible with both Plone 3.x and Plone 4.x. So they only require Plone >= 3. The additional information is "works with Plone 3" and "Plone 4".

I think the classifiers works pretty well there. (If we look at your use cases, and the classifiers browsing features at PyPI) The only problem I can see is the fact that they have to be added "manually" at PyPI. If we put apart this problem, do you see any remaining problem ? Cheers Tarek