对文本文件中的行进行排序,但只使用前n个字符

sorted(array, key=lambda x:x[:24])

>>> a = ["wxyz", "abce", "abcd", "bcde"]
>>> sorted(a)
['abcd', 'abce', 'bcde', 'wxyz']
>>> sorted(a, key=lambda x:x[:3])
['abce', 'abcd', 'bcde', 'wxyz']

import operator

with open('filename', 'r') as f:
    sorted_lines = sorted(f, key=operator.itemgetter(slice(0, 24)))

sorted_lines new_file.writelines(sorted_lines)