1 Abc凹痕意味着账单并享受磨坊
2 Abc凹痕意味着(abc凹痕意味着票据和享受磨坊)
我想使用常规的rexpression获取这个词,意思是' 只有当它介于'之间时才意味着'和'和'。
所以上面的答案应该是
比尔
比尔
我怎样才能在Python中使用正则表达式 我在stackoverflow上搜索它但无法找到答案
答案 0 :(得分:1)
Python允许使用可以验证所需子字符串的外观,而无需实际捕获它。
(?<=\bmeant\s)\w+(?=\sand\b)
此正则表达式将执行以下操作:
meant
和and
meant
和and
是独立的单词,而不是嵌入其他单词。现场演示
https://regex101.com/r/eE8hF2/3
示例文字
请注意第3行中的边框大小写,其中单词android
以单词and
开头,因此可以避免匹配。
1 Abc dent meant bill and enjoy mill
2 Abc dent meant ( abc dent meant droids and enjoy mill )
3 Arthur Dent meant tractors android when he said droid.
样本匹配
MATCH 1
1. [17-21] `bill`
MATCH 2
1. [72-78] `droids`
NODE EXPLANATION
----------------------------------------------------------------------
(?<= look behind to see if there is:
----------------------------------------------------------------------
\b the boundary between a word char (\w)
and something that is not a word char
----------------------------------------------------------------------
meant 'meant'
----------------------------------------------------------------------
\s whitespace (\n, \r, \t, \f, and " ")
----------------------------------------------------------------------
) end of look-behind
----------------------------------------------------------------------
\w+ word characters (a-z, A-Z, 0-9, _) (1 or
more times (matching the most amount
possible))
----------------------------------------------------------------------
(?= look ahead to see if there is:
----------------------------------------------------------------------
\s whitespace (\n, \r, \t, \f, and " ")
----------------------------------------------------------------------
and 'and'
----------------------------------------------------------------------
\b the boundary between a word char (\w)
and something that is not a word char
----------------------------------------------------------------------
) end of look-ahead
----------------------------------------------------------------------
答案 1 :(得分:0)
meant\s+([a-z]+)\s+and
[a-z] +多次匹配a和z之间的所有字符
\ s +匹配多个空格
围绕[a-z] +的括号将匹配放入捕获组,以便以后可以使用
这里有效:https://regex101.com/r/hW5fP7/3
这是一个很好的网站,可以了解有关正则表达式的更多信息:http://www.regular-expressions.info/tutorial.html