python - 正则表达式:用制表符和换行符拆分长字符串

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"

我想提取里面的两句话，即:

• “08/07/2017Peter Praet:采访 De Standaard欧洲央行执行委员会成员 Peter Praet 的采访，由 Pascal Dendooven 和 Goele De Cort 于 2017 年 7 月 3 日进行，发表于 8 2017 年 7 月英文版”

• “NederlandsNL07/07/2017Benoît Coeuré:Le Monde 和 La Stampa 采访欧洲央行执行委员会成员 Benoît Coeuré，由 Marie Charrel (Le Monde) 和 Alessandro Barbera (La Stampa)，7 月 3 日，2017 年 7 月 7 日出版 ENGLISH"

我尝试使用 [\w]+(?!\\t) 但这捕获了 t(1 等中的 t东西。

这里的正确语法是什么？谢谢!

Answer 1

给你，就此分开

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文本最多 分成两部分。

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

@MadPhysicist 建议长度为 20。我给它 40，并在
正则表达式在这部分 (?:(?:(?!\\[\\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