在python中排序列表

Question

如果我有一个字符串列表,例如["a143.txt", "a9.txt", ]我如何按列表中的数字按升序排序,而不是按字符串排序.即我要"a9.txt"出庭"a143.txt",因为9 < 143.

谢谢.

Answer 1

它被称为"自然排序",来自http://www.codinghorror.com/blog/2007/12/sorting-for-humans-natural-sort-order.html

试试这个:

import re 

def sort_nicely( l ): 
  """ Sort the given list in the way that humans expect. 
  """ 
  convert = lambda text: int(text) if text.isdigit() else text 
  alphanum_key = lambda key: [ convert(c) for c in re.split('([0-9]+)', key) ] 
  l.sort( key=alphanum_key )