Question

尝试开发正则表达式以提取不包含特定单词的句子。为了简单起见，这里是一个简单的示例：

输入：矢状侦察器图像颈椎：轻度至中度多级脊椎病。存在骨折。

所需的输出：存在骨折。

尝试＃1

正则表达式： [^.]*(?!cervi(c|x))[^.]*\.

实际输出：矢状球探影像颈椎：轻度至中度多级脊椎病。存在骨折。

尝试＃2：

正则表达式： [^.]*[^(cervi(c|x))][^.]*\.

实际输出：矢状球探影像颈椎：轻度至中度多级脊椎病。存在骨折。

可以在https://regexr.com/

中验证这些结果

Answer 1

使用

(?<![^.])\s*((?:(?!cervi[cx])[^.])*\.)

请参见proof

说明

--------------------------------------------------------------------------------
  (?<!                     look behind to see if there is not:
--------------------------------------------------------------------------------
    [^.]                     any character except: '.'
--------------------------------------------------------------------------------
  )                        end of look-behind
--------------------------------------------------------------------------------
  \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                           more times (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  (                        group and capture to \1:
--------------------------------------------------------------------------------
    (?:                      group, but do not capture (0 or more
                             times (matching the most amount
                             possible)):
--------------------------------------------------------------------------------
      (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
        cervi                    'cervi'
--------------------------------------------------------------------------------
        [cx]                     any character of: 'c', 'x'
--------------------------------------------------------------------------------
      )                        end of look-ahead
--------------------------------------------------------------------------------
      [^.]                     any character except: '.'
--------------------------------------------------------------------------------
    )*                       end of grouping
--------------------------------------------------------------------------------
    \.                       '.'
--------------------------------------------------------------------------------
  )                        end of \1

对不包含特定单词的句子使用正则表达式匹配

1 个答案: