Sort a list of string in an alphanumerical way

sort_alphanumerical.py

import re

def atoi(text): 
    return int(text) if text.isdigit() else text 
 
def natural_keys(text):
    ''' 
    alist.sort(key=natural_keys) sorts in human order 
    http://nedbatchelder.com/blog/200712/human_sorting.html 
    (See Toothy's implementation in the comments) 
    '''
    return [ atoi(c) for c in re.split(r'(\d+)', text) ]
 
 
def sort_list(list_to_sort):
    return list_to_sort.sort(key=natural_keys)