用漂亮的汤解析和排序 html 标签

Question

我有以下 HTML 文件，其中包含bbox来自 PDF 文件的信息：<flow>  <block xMin="53.879997" yMin="369.965298" xMax="63.939976" yMax="380.991433">    <line xMin="53.879997" yMin="369.965298" xMax="63.939976" yMax="380.991433">      <word xMin="53.879997" yMin="369.965298" xMax="63.939976" yMax="380.991433">10</word>    </line>  </block></flow><flow>  <block xMin="53.879997" yMin="417.965298" xMax="63.939976" yMax="428.991433">    <line xMin="53.879997" yMin="417.965298" xMax="63.939976" yMax="428.991433">      <word xMin="53.879997" yMin="417.965298" xMax="63.939976" yMax="428.991433">20</word>    </line>  </block></flow><flow>  <block xMin="111.351361" yMin="369.965298" xMax="134.220382" yMax="380.991433">    <line xMin="111.351361" yMin="369.965298" xMax="134.220382" yMax="380.991433">      <word xMin="111.351361" yMin="369.965298" xMax="116.331548" yMax="380.991433">1</word>      <word xMin="121.909358" yMin="369.965298" xMax="134.220382" yMax="380.991433">PC</word>    </line>  </block></flow>以上是单词的边界框区域：10 20 1 PC在原始文档中，是这样写的：10 1 PC20因此，我想解析上面的 HTML 文件并提取所有 <line>标签，然后按yMin值对它们进行排序。上面的最终输出将是：10 1 PC 20而不是。到目前为止我尝试过的我不是很远，因为我还在学习 Python。我正在使用 BeautifulSoup4：with open("test.html", "r") as f:    contents = f.read()    soup = BeautifulSoup(contents, 'lxml')    for line in soup.find_all("line", attrs={"ymin":True}):        print(line.get('ymin'))上面只是打印出每个标签及其内容。我不确定如何对行标签进行排序。任何帮助将不胜感激。

Answer 1

您可以BeautifulSoup使用soup.find_all：

from bs4 import BeautifulSoup as soup

r = [i.find_all('word') for i in sorted(soup(html, 'html.parser').find_all('line'), key=lambda x:float(x['ymin']))]

result = [i.text for b in r for i in b]

输出：

['10', '1', 'PC', '20']

Answer 2

试试下面的代码。可以定义平均值，然后检查平均值。

from bs4 import BeautifulSoup

html='''<flow>

  <block xMin="53.879997" yMin="369.965298" xMax="63.939976" yMax="380.991433">

    <line xMin="53.879997" yMin="369.965298" xMax="63.939976" yMax="380.991433">

      <word xMin="53.879997" yMin="369.965298" xMax="63.939976" yMax="380.991433">10</word>

    </line>

  </block>

</flow>

<flow>

  <block xMin="53.879997" yMin="417.965298" xMax="63.939976" yMax="428.991433">

    <line xMin="53.879997" yMin="417.965298" xMax="63.939976" yMax="428.991433">

      <word xMin="53.879997" yMin="417.965298" xMax="63.939976" yMax="428.991433">20</word>

    </line>

  </block>

</flow>

<flow>

  <block xMin="111.351361" yMin="369.965298" xMax="134.220382" yMax="380.991433">

    <line xMin="111.351361" yMin="369.965298" xMax="134.220382" yMax="380.991433">

      <word xMin="111.351361" yMin="369.965298" xMax="116.331548" yMax="380.991433">1</word>

      <word xMin="121.909358" yMin="369.965298" xMax="134.220382" yMax="380.991433">PC</word>

    </line>

  </block>

</flow>'''

soup=BeautifulSoup(html,'lxml')

pricemin=soup.select_one('line[yMin]')['ymin']

list1=[]

list_last=[]

for item in soup.select('line[yMin]'):

    if float(pricemin) < float(item['ymin']):

         for w in item.select('word'):

             list_last.append(w.text)

    else:

        for w in item.select('word'):

            list1.append(w.text)

print(list1+list_last)

输出：

['10', '1', 'PC', '20']

打印这个

print(' '.join(list1+list_last))

输出：

10 1 PC 20