pychallenge(3)-re

pychallenge之三

题目还是下面一幅图配上一段话。

One small letter, surrounded by EXACTLY three big bodyguards on each of its sides.

纸面意思是一个小写字母被两边各三个大家伙包围着，其中着重加粗的EXACTLY表明只能正好是三个，

不能多也不能少。和之前一样看网页source发现一段文字，代码如下：

# -*- coding: utf-8 -*-
import re

def findwk(file):
    """
    :type file: str
    :rtype: list
    """
    result = []
    with open(file) as f:
        cont = f.read()
        result = re.findall('[^A-Z][A-Z]{3}[a-z][A-Z]{3}[^A-Z]', cont)

    return [word[4] for word in result]

if __name__ == '__main__':
    print findwk('C:\Users\Katsu\Desktop\pych3.txt')

运行结果得：

C:\Python27\python.exe D:/Py/test/test.py
['l', 'i', 'n', 'k', 'e', 'd', 'l', 'i', 's', 't']

组合下应该是linkedlist.