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      1. 如何替换点(.)在句子中,除非它出现在使用正则表达式的缩写中

        时间:2024-08-11

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                • 本文介绍了如何替换点(.)在句子中,除非它出现在使用正则表达式的缩写中的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我希望将句子中的每个点替换为空格,但与缩写一起使用时除外。当它与缩写一起使用时,我希望将其替换为''NULL。

                  缩写表示至少包含两个大写字母的圆点。

                  我的regex正在工作,但它们捕获U.S.

                  r1 = r'((?:[A-Z].){2,})s*'
                  r2 = r'(?:[A-Z].){2,}'
                  
                  'U.S.A is abbr  x.y  is not. But I.I.T. is also valid ABBVR and so is M.Tech'
                  
                  should become
                  
                  'USA is abbr  x y  is not But IIT is also valid ABBVR and so is MTech'
                  

                  更新:不应考虑任何数字或特殊字符。

                  X.2 -> X 2
                  X. -> X 
                  X.* -> X - 
                  

                  推荐答案

                  您可以使用

                  import re
                  s='U.S.A is abbr  x.y  is not. But I.I.T. is also valid ABBVR and so is M.Tech, X.2, X., X.*'
                  print(re.sub(r'(?<=[A-Z])(.)(?=[A-Z])|.', lambda x: '' if x.group(1) else ' ', s))
                  # =>  USA is abbr  x y  is not  But IIT  is also valid ABBVR and so is MTech, X 2, X , X *
                  

                  请参阅Python demo。这里有一个regex demo。它匹配

                  • (?<=[A-Z])(.)(?=[A-Z])-组1:前后紧跟大写ASCII字母的.字符
                  • |-或
                  • .-点(在任何其他上下文中)

                  如果Group 1匹配,则替换为空字符串,否则替换为空格。

                  若要使其支持Unicode,请安装PyPI regex库(pip install regex)并使用

                  import regex
                  s='U.S.A is abbr  x.y  is not. But I.I.T. is also valid ABBVR and so is M.Tech, X.2, X., X.*'
                  print(regex.sub(r'(?<=p{Lu})(.)(?=p{Lu})|.', lambda x: '' if x.group(1) else ' ', s))
                  

                  p{Lu}匹配任何Unicode大写字母。

                  这篇关于如何替换点(.)在句子中,除非它出现在使用正则表达式的缩写中的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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