Another penny dropped when it comes to version specs.
Should 2.5 mean 2.5.0 only, or 2.5.*. Well... why would you ever need
to specify 2.5.0 only. That's a nonsense specification.
"My project requires Python 2.5.0, but doesn't work with 2.5.1". Huh!?
Well, then fix it, goofball. :)
2.5 can mean 2.5.* without any problems. And 3 should mean 3.*.*.
New suggested spec:
versionrequirements ::= 'Requires-Python: ' specificationlist
specificationlist ::= specification (; specification)*
specification ::= version | "[" [version] ":" [version] "]"
version ::= lc_number ["." lc_number [ "." lc_number ] ]
With examples being:
Requires-Python: [2.5.2:3]; [3.1:]
Or on several rows:
Requires-Python: [2.5.2:3];
[3.1.2];
[3.2:]
Meaning 2.5.2 or later, but not Python 3. *or*
Python 3.1.2. *or*
Python 3.2 or later.
Or if slicing syntax is not wanted:
versionrequirements ::= 'Requires-Python: ' specificationlist
specificationlist ::= specification (; specification)*
specification ::= version | minimum | maximum | miniumum " " maximum
minimum ::= ('>' | '>=') version
maximum ::= ('<' | '<=') version
version ::= lc_number ["." lc_number [ "." lc_number ] ]
That would mean something like the following:
Requires-Python: >= 2.5.2 < 3; >= 3.1
or more clearer if it's split up in lines:
Requires-Python: >= 2.5.2 < 3;
>= 3.1
The following would be illegal:
Requires-Python: >= 2.5.2 > 3
Requires-Python: <= 2.5.2 < 3
Requires-Python: <= 2.5.2 < 3 > 3.1
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