Ben Finney wrote:
Tarek Ziadé <ziade.tarek@gmail.com> writes:
On Mon, Dec 28, 2009 at 1:41 AM, Sridhar Ratnakumar <sridharr@activestate.com> wrote:
Also, "Requires-Python: 3" would include all 3.X versions, correct? Correct, because, "Requires-Python: 3" is equivalent to "Requires-Python: ~= 3" which is equivalent to "Requires-Python: 3.x.x"
This is totally counter to conventional comparisons, and is an excellent example of why the equivalence of ‘3’ to ‘>=3, <4’ is a bad idea.
Instead, the default should be ‘==’. That is, ‘Requires-Python: 3’ should be equivalent to ‘Requires-Python: ==3’; and only “3” or “3.0” or “3.0.0” etc. will match. I maintain that is what most people will expect on seeing that syntax.
If a less strict range is desired, the existing comparison operators ‘>’, ‘>=’, ‘<’, ‘<=’ are sufficient, more obvious, and more explicit. In other words, to get the meaning you desire above, the existing operators can be used: ‘Requires-Python: >=3, <4’.
Perhaps there should be a new range operator: Requires-Python: 3 ~ 4 Half-open, of course.