正则表达式：用制表符和换行符分割一个长字符串

Question

考虑以下字符串：

08/07/2017Peter Praet: Interview with De StandaardInterview with Peter Praet,  Member of the Executive Board of the ECB,  conducted by Pascal Dendooven and Goele De Cort on 3 July 2017,  published on 8 July 2017ENGLISH\n\t\t\t\t\t\t\tOTHER LANGUAGES\n\t\t\t\t\t\t\t(1)\n\t\t\t\t\t\t\t+\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\tSelect your language\n\t\t\t\t\t\t\t\n\t\t\t\t\t\tNederlandsNL07/07/2017Benoît Cœuré: Interview with Le Monde and La StampaInterview with Benoît Cœuré,  Member of the Executive Board of the ECB,  conducted by Marie Charrel (Le Monde) and Alessandro Barbera (La Stampa),  on 3 July,  published on 7 July 2017ENGLISH"

我想把里面的两句话提取出来，分别是：

• "08/07/2017Peter Praet: Interview with De StandaardInterview with Peter Praet, Member of the Executive Board of the ECB, conducted by Pascal Dendooven and Goele De Cort on 3 July 2017, published on 8 July 2017ENGLISH"

• "NederlandsNL07/07/2017Benoît Cœuré: Interview with Le Monde and La StampaInterview with Benoît Cœuré, Member of the Executive Board of the ECB, conducted by Marie Charrel (Le Monde) and Alessandro Barbera (La Stampa), on 3 July, published on 7 July 2017ENGLISH"

我尝试使用[\w]+(?!\\t)，但这会捕获t(1 中的t 以及其他内容。

这里的正确语法是什么？ 谢谢！

Answer 1

给你，分开吧

r'(?:\\[\\ntr])+(?:(?:(?!\\[\\ntr]).)*\\[\\ntr])*'

http://www.regex101.com/r/lNv8VO/1

解释

 (?: \\ [\\ntr] )+             # The start of a block of escaped \ or n or t or r
                               # Get as many as are there (like '\n\n\r\r\t\t\n\\', etc)
 (?:                           # Cluster optional
      (?:                           # ----------
           (?! \\ [\\ntr] )              # Not an escaped \ or n or t or r ahead
           .                             # This is ok, consume this
      )*                            # ---------- 0 to many times
      \\ [\\ntr]                    # A required escaped \ or n or t or r at the end
 )*                            # Cluster end, do 0 to many times

---

注意
上面的正则表达式会将 most 处的文本分成 2 个部分。

如果拆分内容包含非转义的 r,n,t，那么您可以允许 for
如果文本低于某个阈值，则进行多次拆分。

@MadPhysicist 建议长度为 20。我会给它 40，并在
正则表达式，在本节(?:(?:(?!\\[\\ntr]).){0,20} 中给它一个范围。

新的正则表达式是

r'(?s)(?:\\[\\ntr])+(?:\s*(?:(?!\\[\\ntr]).){0,40}?\s*\\[\\ntr])*'

https://regex101.com/r/lNv8VO/3

解释

 (?s)                          # Modifiers:  dot-all
 (?: \\ [\\ntr] )+             # The start of a block of escaped \ or n or t or r
                               # Get as many as are there (like '\n\n\r\r\t\t\n\\', etc)
 (?:                           # Cluster optional
      \s*                           # Optional whitespace
      (?:                           # ----------
           (?! \\ [\\ntr] )              # Not an escaped \ or n or t or r ahead
           .                             # This is ok, consume this
      ){0,40}?                      # ---------- Allow (non-greedy) 0 to 40 characters for multiple sections
      \s*                           # Optional whitespace
      \\ [\\ntr]                    # A required escaped \ or n or t or r at the end
 )*                            # Cluster end, do 0 to many times

Answer 2

在 Python 中，您可以根据制表符和换行符拆分字符串，然后过滤掉太短的内容。

import re

[x for x in re.split('\n\t+', long_string) if len(x) > 20]

Answer 3

假设 \n 和 \t 字符实际上是换行符和制表符。试试：

([^\n\t]*)

然后增加它以摆脱其他语言等。