美丽的汤从标签获取标签（不是Navigable Strings）的孩子-Java 学习之路

美丽的汤文档提供了属性.contents和.children来访问给定标记的子元素（分别是列表和迭代），并包括Navigable Strings和Tags . 我只想要Tag类型的孩子 .

我目前正在使用列表理解来完成此任务：

rows=[x for x in table.tbody.children if type(x)==bs4.element.Tag]

但我想知道是否有一个更好/更pythonic /内置的方式来获得Tag儿童 .

1 回答

感谢J.F.Sebastian，以下内容将有效：

rows=table.tbody.find_all(True, recursive=False)

这里的文档：http://www.crummy.com/software/BeautifulSoup/bs4/doc/#true

在我的情况下，我需要表中的实际行，所以我最终使用了以下内容，这更精确，我认为更具可读性：

rows=table.tbody.find_all('tr')

再次，文档：http://www.crummy.com/software/BeautifulSoup/bs4/doc/#navigating-using-tag-names

我相信这比迭代标签的所有子项更好 .

使用以下输入：

<table cellspacing="0" cellpadding="0">
  <thead>
    <tr class="title-row">
      <th class="title" colspan="100">
        <div style="position:relative;">
          President
            <span class="pct-rpt">
                99% reporting
            </span>
        </div>
      </th>
    </tr>
    <tr class="header-row">
        <th class="photo first">

        </th>
        <th class="candidate ">
          Candidate
        </th>
        <th class="party ">
          Party
        </th>
        <th class="votes ">
          Votes
        </th>
        <th class="pct ">
          Pct.
        </th>
        <th class="change ">
          Change from &lsquo;08
        </th>
        <th class="evotes last">
          Electoral Votes
        </th>
    </tr>
  </thead>
  <tbody>
      <tr class="">
          <td class="photo first">
            <div class="photo_wrap"><img alt="P-barack-obama" height="48" src="http://i1.nyt.com/projects/assets/election_2012/images/candidate_photos/election_night/p-barack-obama.jpg?1352320690" width="68" /></div>
          </td>
          <td class="candidate ">
            <div class="winner dem"><img alt="Hp-checkmark@2x" height="9" src="http://i1.nyt.com/projects/assets/election_2012/images/swatches/hp-checkmark@2x.png?1352320690" width="10" />Barack Obama</div>
          </td>
          <td class="party ">
            Dem.
          </td>
          <td class="votes ">
            2,916,811
          </td>
          <td class="pct ">
            57.3%
          </td>
          <td class="change ">
            -4.6%
          </td>
          <td class="evotes last">
            20
          </td>
      </tr>
      <tr class="">
          <td class="photo first">

          </td>
          <td class="candidate ">
            <div class="not-winner">Mitt Romney</div>
          </td>
          <td class="party ">
            Rep.
          </td>
          <td class="votes ">
            2,090,116
          </td>
          <td class="pct ">
            41.1%
          </td>
          <td class="change ">
            +4.3%
          </td>
          <td class="evotes last">
            0
          </td>
      </tr>
      <tr class="">
          <td class="photo first">

          </td>
          <td class="candidate ">
            <div class="not-winner">Gary Johnson</div>
          </td>
          <td class="party ">
            Lib.
          </td>
          <td class="votes ">
            54,798
          </td>
          <td class="pct ">
            1.1%
          </td>
          <td class="change ">
            &ndash;
          </td>
          <td class="evotes last">
            0
          </td>
      </tr>
      <tr class="last-row">
          <td class="photo first">

          </td>
          <td class="candidate ">
            div class="not-winner">Jill Stein</div>
          </td>
          <td class="party ">
            Green
          </td>
          <td class="votes ">
            29,336
          </td>
          <td class="pct ">
            0.6%
          </td>
          <td class="change ">
            &ndash;
          </td>
          <td class="evotes last">
            0
          </td>
      </tr>
      <tr>
        <td class="footer" colspan="100">
          <a href="/2012/results/president">President Map</a> &nbsp;|&nbsp;
          <a href="/2012/results/president/big-board">President Big Board</a>&nbsp;|&nbsp;
          <a href="/2012/results/president/exit-polls?state=il">Exit Polls</a>
        </td>
      </tr>
  </tbody>
</table>

回复于 2024-04-19T12:31:09+08:00

美丽的汤从标签获取标签（不是Navigable Strings）的孩子

1 回答

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