On Mon, Dec 28, 2009 at 3:03 AM, MRAB email@example.com wrote:
Martin v. Löwis wrote:
No application developer will quickly figure out what a tilde means. Maybe it means 'roughly', but it requires too much thought and is ambiguous. 2.5 is not roughly 2.5.2. It is the same exactly.
Before we had : Requires-Python: 2.5, 2.6
That made much more sense. It was simple and unambiguous, and is relevant to typical packaging scenarios.
Unfortunately, it is fairly ambiguous, and makes no sense. It means "requires Python 2.5 *AND* requires Python 2.6", which is a requirement that no single version can meet.
Does that mean we should add "or"?
Requires-Python: 2.5 or 2.6
Should we also use "and" instead of ","?
Requires-Python: >= 2.5 and < 2.6
This was discussed aready in Ditsutils-SIG : *and* is enough to express everything, so for the sake of simplicity, the comma means *and* all the time, as Mentioned in http://www.python.org/dev/peps/pep-0345/#version-specifiers