[Distutils] Choice of dependencies?

[Phillip J. Eby]

At 08:53 PM 12/3/2005 +0000, John J Lee wrote:
>Is it possible for a package to depend on one of several packages, with
>the user having the option to pick?  For example, my package P might
>depend on package A, plus either package B or package C.

Interesting; I'd be curious to know what P, B and C translate to in real 
packages.  :)


>I know I could (ab)use extras_require, but in my case this is a real
>dependency rather than an optional extra.  The other option I have is to
>just pick one of the dependencies (B or C in my example above), and
>thereby force people to install it even though it's not strictly required.
>Neither option seems particularly attractive.

I'm surprised that such a condition exists; it seems like one of the two 
would be redundant.