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sicongliu
V2EX  ›  Python

请问这个正则表达式如何写

  •  
  •   sicongliu · May 28, 2015 · 3902 views
    This topic created in 4007 days ago, the information mentioned may be changed or developed.
    <dt><a name="313"></a>ADHE 313 (6) <b>Organization of Adult Basic Education Programs</b></dt>

    想抓出ADHE313和Organization of Adult Basic Education Programs
    18 replies    2015-05-29 10:45:43 +08:00
    asj
        1
    asj  
       May 28, 2015
    这难道不是应该用CSS/JQuery selector,或者XPath么?
    phx13ye
        2
    phx13ye  
       May 28, 2015   ❤️ 1
    <\/a>(.*)<b>(.*?)<\/b>
    sicongliu
        3
    sicongliu  
    OP
       May 28, 2015
    xpath比较简单 但是想学下正则的方法
    shoumu
        4
    shoumu  
       May 28, 2015
    看一下pyquery吧,支持jQuery的语法
    professorz
        5
    professorz  
       May 28, 2015
    .+<\\/a>(.+)(6)<b>(.+)<\\/b>.+
    java下的regex
    sicongliu
        6
    sicongliu  
    OP
       May 28, 2015
    python的如何写
    yiyiwa
        7
    yiyiwa  
       May 28, 2015
    python测试了一下,不完善,有空的东西。

    '\>([^\<]*)\<'
    sicongliu
        8
    sicongliu  
    OP
       May 28, 2015
    m=re.search("</a>(.*?)\s(",text)
    print (m.group(1))

    m=re.search("<b>(.*?)</b>(",text)
    print (m.group(1))
    sicongliu
        9
    sicongliu  
    OP
       May 28, 2015
    如果要取ADHE 313呢?
    如何判断第二个空格?当然用字符串的search切片功能很容易达到,只是想知道正则如何达到
    sicongliu
        10
    sicongliu  
    OP
       May 28, 2015
    m=re.search("</a>(.*?)\s+\(",text)
    print (m.group(1))

    当然方法比较笨,如果第二个空格后不是“(”就没办法了
    asj
        11
    asj  
       May 28, 2015
    简单写了一个,还很不完善
    (?:<dt.*?>)(?:.*?\/.*?>)([\w ]*)(?:.*?)(?:<\/dt>)

    http://regexr.com/3b3bs
    fy
        12
    fy  
       May 28, 2015
    这个需求不用正则,会简单得多

    page.xpath("//dt/text()") -> ADHE 313 (6)
    page.xpath("//dt/b/text()") -> Organization of Adult Basic Education Programs
    picasso250
        13
    picasso250  
       May 28, 2015
    /a>([\w ()]+)<b>([\w ]+)</b>
    最简单的解决了你现在的问题。
    picasso250
        14
    picasso250  
       May 28, 2015
    对不起,上一个是错误的,多提取了(6)

    /a>(\w+ \d+).+?<b>([\w ]+)</b>
    leozy2014
        15
    leozy2014  
       May 28, 2015
    print re.findall('</a>(.*?) \(6\) <b>(.*?)</b></dt>', s)
    #[('ADHE 313', 'Organization of Adult Basic Education Programs')]
    wmttom
        16
    wmttom  
       May 28, 2015
    python正则 (?<=>)[\w, ,\(,\)]+?(?= \(|<)

    re.findall("(?<=>)[\w, ,\(,\)]+?(?= \(|<)", '<dt><a name="313"></a>ADHE 313 (6) <b>Organization of Adult Basic Education Programs</b></dt>')

    ['ADHE 313', 'Organization of Adult Basic Education Programs']
    sicongliu
        17
    sicongliu  
    OP
       May 29, 2015
    楼上两个貌似都不能用
    sicongliu
        18
    sicongliu  
    OP
       May 29, 2015
    sorry这个可行

    print re.findall('</a>(.*?) \(6\) <b>(.*?)</b></dt>', s)
    #[('ADHE 313', 'Organization of Adult Basic Education Programs')]
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