how to do a numeric sort

[DeaD_EyE]

I did this in 15 minutes to wake up..

Output:
andre@andre-GP70-2PE:~$ python  by_version.py 
{(2, 4): ['python2.4.1-foo.gz'],
 (3, 4): ['python3.4.0-foo.gz',
          'python-3.4.2-foo.gz',
          'python-3.4.3-foo.gz',
          'python-3.4.4-foo.gz',
          'python-3.4.5-foo.gz',
          'python-3.4.6-foo.gz',
          'python-3.4.7-foo.gz',
          'python-3.4.8-foo.gz',
          'python-3.4.9-foo.gz',
          'python-3.4.10foo.gz'],
 (3, 5): ['python-3.5.0-foo.gz',
          'python-3.5.1-foo.gz',
          'python-3.5.2-foo.gz',
          'python-3.5.3-foo.gz',
          'python-3.5.4-foo.gz',
          'python-3.5.5-foo.gz',
          'python-3.5.6-foo.gz',
          'python-3.5.7-foo.gz']}

import re
from itertools import groupby
from pprint import pprint


pattern = re.compile(r'python-?(\d+)\.(\d+)\.(\d+)-?.+\.gz')


def by_version(version_string):
    match = pattern.search(version_string)
    if match:
        return tuple(int(v) for v in match.groups())
    else:
        return 0, 0, 0


def sort_by_major_minor(versions):
    sorted_versions = sorted(versions, key=by_version)
    result = {}
    for major_group, major in groupby(sorted_versions, key=lambda v: by_version(v)[0]):
        #print('Major', major_group)
        for minor_group, minor in groupby(major, key=lambda v: by_version(v)[1]):
            #print('Minor', minor_group)
            result[(major_group, minor_group)] = list(minor)
    return result
    
    
lst = ['python3.4.0-foo.gz',
       'python2.4.1-foo.gz',
       'python-3.4.10foo.gz',
       'python-3.4.2-foo.gz',
       'python-3.4.3-foo.gz',
       'python-3.4.4-foo.gz',
       'python-3.4.5-foo.gz',
       'python-3.4.6-foo.gz',
       'python-3.4.7-foo.gz',
       'python-3.4.8-foo.gz',
       'python-3.4.9-foo.gz',
       'python-3.5.0-foo.gz',
       'python-3.5.1-foo.gz',
       'python-3.5.2-foo.gz',
       'python-3.5.3-foo.gz',
       'python-3.5.4-foo.gz',
       'python-3.5.5-foo.gz',
       'python-3.5.6-foo.gz',
       'python-3.5.7-foo.gz']


pprint(sort_by_major_minor(lst))

I did it how I would group Major and Minor Versions together.