[英]Regex: split new lines between constant words
Given给定
Word1 content1 content1 content1
content2 content2 content2
content3 content3 content3
Word2
I want to extract as groups content1, content2 and content3.我想将 content1、content2 和 content3 提取为组。 Could you help to make a regex for that?
你能帮忙做一个正则表达式吗? I tried:
我试过了:
Word1[\s:]*((?P<value>[^\n]+)\n)+Word2
with gms flags, but it didn't help. Word1[\s:]*((?P<value>[^\n]+)\n)+Word2
带有 gms 标志,但它没有帮助。 I need regex for python re module.我需要 python re 模块的正则表达式。
You can use您可以使用
import re
text = "Word1 content1 content1 content1\n content2 content2 content2\n content3 content3 content3\nWord2"
match = re.search(r'Word1[\s:]*((?:.+\n)*)Word2', text)
if match:
print([s.strip() for s in match.group(1).splitlines()])
See the Python and the regex demo .请参阅Python和正则表达式演示。
Output:输出:
['content1 content1 content1', 'content2 content2 content2', 'content3 content3 content3']
Details :详情:
Word1
- a Word1
string Word1
- Word1
字符串[\s:]*
- zero or more whitespaces and colons [\s:]*
- 零个或多个空格和冒号((?:.+\n)*)
- Group 1: zero or more repetitions of one or more chars other than line break chars as many as possible, followed with a newline char ((?:.+\n)*)
- 第 1 组:除换行符以外的一个或多个字符的零次或多次重复,后跟换行符Word2
- a Word2
string. Word2
- Word2
字符串。 Then, if there is a match, [s.strip() for s in match.group(1).splitlines()]
splits the Group 1 value into separate lines.然后,如果有匹配项,
[s.strip() for s in match.group(1).splitlines()]
将 Group 1 值拆分为单独的行。
An alternative solution using the PyPi regex library can be使用PyPi 正则表达式库的替代解决方案可以是
import regex
text = "Word1 content1 content1 content1\n content2 content2 content2\n content3 content3 content3\nWord2"
print( regex.findall(r'(?<=Word1[\s:]*(?s:.*?))\S(?:.*\S)?(?=(?s:.*?)\nWord2)', text) )
See the Python demo .请参阅Python 演示。 Details :
详情:
(?<=Word1[\s:]*(?s:.*?))
- a positive lookbehind that requires a Word1
string, zero or more whitespaces or colons, and then any zero or more chars as few as possible immediately to the left of the current location (?<=Word1[\s:]*(?s:.*?))
- 需要一个Word1
字符串、零个或多个空格或冒号,然后是尽可能少的零个或多个字符当前位置的左侧\S(?:.*\S)?
- a non-whhitespace char and then any zero or more chars other than line break chars as many as possible till the last non-whitespace char on the line (?=(?s:.*?)\nWord2)
- a positive lookahead that requires any zero or more chars as few as possible and then a newline char and Word2
word to the right of the current location. (?=(?s:.*?)\nWord2)
- 一个正向前瞻,需要尽可能少的零个或多个字符,然后在当前位置右侧添加一个换行符和Word2
字。Better extract to group everything between 2 words and then split it with new line symbol.更好地提取以将 2 个单词之间的所有内容分组,然后用换行符将其拆分。
first_key = "Word1"
second_key = "Word2"
common_regex = r"{first_key}[\s:]*(?P<value>.+){second_key}"
regex = common_regex.format(first_key=first_key, second_key=second_key)
lines = [x.group("value").strip() for x in re.finditer(regex, text_piece, re.DOTALL)]
if lines:
lines = lines[0].split("\n")
else:
lines = []
print(lines)
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