處理natural sorting排列順序問題 - 例如：原本應該是:1,2,12,15，電腦會變成:1,12,15,2

natural_sorting.py

# original from https://stackoverflow.com/a/5967539
# 使用sort()方法時需要注意資料型態必須為list

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) ]

alist=[
    "something1",
    "something12",
    "something17",
    "something2",
    "something25",
    "something29"]

alist.sort(key=natural_keys)
print(alist)

#['something1', 'something2', 'something12', 'something17', 'something25', 'something29']