用于在DataFrame中查找第二个匹配项的正则表达式

Question

我在数据帧中有一个字符串列，我想从中提取最后一次出现反斜杠的速率。

After so many requests, this is Bretagne. She was the last surviving 9/11 search dog, and our second ever 14/10. RIP* 

我想要14/10

Answer 1

尝试此代码以获取此句子中所有日期的列表

import re
re.findall(r"d+/d+","After so many requests, this is Bretagne. She was the last surviving 9/11 search dog, and our second ever 14/10. RIP* ")

要获得第二项，只需在此列表中选择第二项即可

Answer 2

此正则表达式有效：

>>> s = "After so many requests, this is Bretagne. She was the last surviving 9/11 search dog, and our second ever 14/10. RIP*"
>>> re.findall("d+/(?=[^/]*$)d+", s)
['14/10']