Help sorting a list by file extension

[Tom Anderson]

On Fri, 12 Aug 2005, Bengt Richter wrote:

> On Fri, 12 Aug 2005 00:06:17 GMT, Peter A. Schott <paschott at no.yahoo.spamm.com> wrote:
>
>> Trying to operate on a list of files similar to this:
>>
>> test.1
>> test.2
>> test.3
>>
>> I want to sort them in numeric order instead of string order.
>
> >>> [name for dec,name in sorted((int(nm.rsplit('.',1)[1]),nm) for nm in namelist)]
> ['test.1', 'test.2', 'test.3', 'test.4', 'test.10', 'test.15', 'test.20']
>
> This depends on the extension being nicely splittable with a single '.'

You could use os.path.splitext to do that more robustly:

>>> [name for dec,name in sorted((int(os.path.splitext(nm)[1][1:]),nm) for nm in namelist)]

tom

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