I think distutils.version.LooseVersion should be safe to use (django-cms is 
using it, for example). Not sure about "packaging". Do you want to create a 
Trac ticket for this issue? Probably the same technique could also be used 
in other places.

On Friday, February 10, 2017 at 5:58:29 AM UTC-5, [email protected] wrote:
>
> Hi !
>
> psycopg2 is preparing a new release, and currently the git project uses PEP 
> 440 <https://www.python.org/dev/peps/pep-0440/>-compatible version 
> numbers : 2.7b1,  2.7b2.dev0 (see 
> https://github.com/psycopg/psycopg2/blob/master/setup.py#L67) 
>
> In 
> https://github.com/django/django/blob/master/django/db/backends/postgresql/base.py,
>  
> django parses that version string to check if it is greater than 2.4.5.
>
> But the psycopg2_version function can't handle version strings like 2.7b1, 
> and returns (2,).
>
> Any ideas to improve django ?
>
> The "packaging" package could be used for that : 
> https://packaging.pypa.io/en/latest/version/, a correct version parser 
> does not seem simple !
> Or "from distutils.version import LooseVersion"
>
> Thanks,
> NotSqrt
>

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