分享程序员开发的那些事...
更新时间：2023-11-13 22:54:28
使用 re.S 或 re.DOTALL 标志.或者在正则表达式前加上 (?s) 使 . 匹配所有字符(包括换行符).
没有标志，. 不匹配换行符.
(?s)(?)示例:
>>>s = '''I have the following test (formatted just like below):
<td scope="row" align="left">
My Class: TEST DATA<br>
Test Section: <br>
MY SECTION<br>
MY SECTION 2<br>
</td>
I'm attempting to get the text between "Test Section: and the after the MY SECTION
I've tried several attempts with different RegEx patterns and I'm not getting anywhere.
If I do:
(?<=Test)(.*?)(?=<br)
Then I get the correct response of:
' Section: '
But, if I do
(?<=Test)(.*?)(?=</td>)
I get no results. The results should be "MY SECTIon
MY SECTION 2
"
I've tried using RegEx Multiline as well with no results.
Any help would be appreciated.
If it matters I'm coding in Python 2.7.
If something is not clear, or you need more info, please let me know.
Use re.S or re.DOTALL flags. Or prepend the regular expression with (?s) to make . matches all character (including newline).
Without the flags, . does not match newline.
(?s)(?<=Test)(.*?)(?=</td>)
Example:
>>> s = '''<td scope="row" align="left">
... My Class: TEST DATA<br>
... Test Section: <br>
... MY SECTION<br>
... MY SECTION 2<br>
... </td>'''
>>>
>>> import re
>>> re.findall('(?<=Test)(.*?)(?=</td>)', s) # without flags
[]
>>> re.findall('(?<=Test)(.*?)(?=</td>)', s, flags=re.S)
[' Section: <br>\n MY SECTION<br>\n MY SECTION 2<br>\n ']
>>> re.findall('(?s)(?<=Test)(.*?)(?=</td>)', s)
[' Section: <br>\n MY SECTION<br>\n MY SECTION 2<br>\n ']