PJ Eby <pje <at> telecommunity.com> writes: > I notice that distlib appears to support chaining of comparisons, but > the PEP does not. ISTM that there is no sane use case for chaining, > given the nature of comparisons that are allowed. (That is, if you > perform one equality or contains comparison between two values, then > you know how the next comparison would turn out.) > > If chained comparisons are disallowed in the PEP, then distlib > probably shouldn't be allowing them either, to prevent interop issues > w/tools that only support what's in the PEP.
Sorry if I'm being dense, but can you confirm that what you mean by "chaining" is something like "a < b <= c"? Things can be tightened up once PEP 426 is finalised. At the moment, distlib allows expressions like "python_version >= '2.6'" or "python_version < '3.5'" which are also not mentioned in the PEP. I don't recall seeing any discussion around why allowing inequalities might be a bad idea, but perhaps someone can point me to it? Perhaps it should be mentioned in the PEP. Regards, Vinay Sajip _______________________________________________ Distutils-SIG maillist - [email protected] http://mail.python.org/mailman/listinfo/distutils-sig
