[Cython] [cython-users] Re: Cython 0.17 beta 1 released

[Yaroslav Halchenko]

On Thu, 02 Aug 2012, Stefan Behnel wrote:
> > just a side-note -- I didn't know that StrictVersion doesn't play nicely with LooseVersion to any degree:

> > $> python -c 'from distutils.version import LooseVersion as LV, StrictVersion as SV; print SV("0.17") > LV("0.18")' 
> > True

> > at least in python3 it pukes:

> > $> python3 -c 'from distutils.version import LooseVersion as LV, StrictVersion as SV; print(SV("0.17") > LV("0.18"))' 
> > Traceback (most recent call last):
> >   File "<string>", line 1, in <module>
> >   File "/usr/lib/python3.2/distutils/version.py", line 70, in __gt__
> >     c = self._cmp(other)
> >   File "/usr/lib/python3.2/distutils/version.py", line 179, in _cmp
> >     if self.version < other.version:
> > TypeError: unorderable types: tuple() < list()

> That's surprising at first sight, but I don't think it hurts all that much.
> People would normally use either of them, not both.

I understand that but absence of error in python2.x case (thus suggesting
supporting such a comparison) is misleading at  least

> Anyway, the next release candidate of Cython will be called 0.17c1. Both
> the LooseVersion and the NormalizedVersion should be able to handle that.

not quite:

1.

$> python -c 'from distutils.version import LooseVersion as LV, StrictVersion as SV; print(SV("0.17") > SV("0.17c1"))'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/distutils/version.py", line 40, in __init__
    self.parse(vstring)
  File "/usr/lib/python2.7/distutils/version.py", line 107, in parse
    raise ValueError, "invalid version number '%s'" % vstring
ValueError: invalid version number '0.17c1'


so it needs to be 0.17b1 I guess

$> python -c 'from distutils.version import LooseVersion as LV, StrictVersion as SV; print(SV("0.17") > SV("0.17b1"))'
True


2. LooseVersion is too loose to be used with standardized suffixes, so it
would not sort those release candidates appropriately

$> python -c 'from distutils.version import LooseVersion as LV, StrictVersion as SV; print(LV("0.17") > LV("0.17b1"))' 
False



-- 
Yaroslav O. Halchenko
Postdoctoral Fellow,   Department of Psychological and Brain Sciences
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419
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