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Python 正则表达式查找相邻字符

2014-08-19 10:48 423 查看
Regular Expression

# among word1 word2 word3, at most 5 words from each other
\b(?:(?:word1()|word2()|word3()|(?:\1|\2|\3)\w+)\b\W*?){3,8}\1\2\3

# among word1 word2 word3, any distance from each other
^(?=[\s\S]*?\bword1\b)(?=[\s\S]*?\bword2\b)(?=[\s\S]*?\bword3\b)[\s\S]*
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