Question

我正在尝试使用美丽的汤解析行表并保存dict中每行的值。

一个打嗝是表的结构有一些行作为节标题。因此，对于具有类“header”的任何行，我想定义一个名为“section”的变量。这就是我所拥有的，但它不起作用，因为它说['class'] TypeError: string indices must be integers

这就是我所拥有的：

for i in credits.contents:
    if i['class'] == 'header':
        section = i.contents
        DATA_SET[section] = {}
    else:
        DATA_SET[section]['data_point_1'] = i.find('td', {'class' : 'data_point_1'}).find('p').contents
        DATA_SET[section]['data_point_2'] = i.find('td', {'class' : 'data_point_2'}).find('p').contents
        DATA_SET[section]['data_point_3'] = i.find('td', {'class' : 'data_point_3'}).find('p').contents

数据示例：

<table class="credits">
    <tr class="header">
        <th colspan="3"><h1>HEADER NAME</h1></th>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA</p></td>
        <td class="data_point_2"><p>DATA</p></td>
        <td class="data_point_3"><p>DATA</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA</p></td>
        <td class="data_point_2"><p>DATA</p></td>
        <td class="data_point_3"><p>DATA</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA</p></td>
        <td class="data_point_2"><p>DATA</p></td>
        <td class="data_point_3"><p>DATA</p></td>
    </tr>
    <tr class="header">
        <th colspan="3"><h1>HEADER NAME</h1></th>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA</p></td>
        <td class="data_point_2"><p>DATA</p></td>
        <td class="data_point_3"><p>DATA</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA</p></td>
        <td class="data_point_2"><p>DATA</p></td>
        <td class="data_point_3"><p>DATA</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA</p></td>
        <td class="data_point_2"><p>DATA</p></td>
        <td class="data_point_3"><p>DATA</p></td>
    </tr>
</table>

Answer 1

这是一个解决方案，稍微调整您的示例数据，以便结果更清晰：

from BeautifulSoup import BeautifulSoup
from pprint import pprint

html = '''<body><table class="credits">
    <tr class="header">
        <th colspan="3"><h1>HEADER 1</h1></th>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA11</p></td>
        <td class="data_point_2"><p>DATA12</p></td>
        <td class="data_point_3"><p>DATA12</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA21</p></td>
        <td class="data_point_2"><p>DATA22</p></td>
        <td class="data_point_3"><p>DATA23</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA31</p></td>
        <td class="data_point_2"><p>DATA32</p></td>
        <td class="data_point_3"><p>DATA33</p></td>
    </tr>
    <tr class="header">
        <th colspan="3"><h1>HEADER 2</h1></th>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA11</p></td>
        <td class="data_point_2"><p>DATA12</p></td>
        <td class="data_point_3"><p>DATA13</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA21</p></td>
        <td class="data_point_2"><p>DATA22</p></td>
        <td class="data_point_3"><p>DATA23</p></td>
    </tr>
    <tr>
        <td class="data_point_1"><p>DATA31</p></td>
        <td class="data_point_2"><p>DATA32</p></td>
        <td class="data_point_3"><p>DATA33</p></td>
    </tr>
</table></body>'''

soup = BeautifulSoup(html)
rows = soup.findAll('tr')

section = ''
dataset = {}
for row in rows:
    if row.attrs:
        section = row.text
        dataset[section] = {}
    else:
        cells = row.findAll('td')
        for cell in cells:
            if cell['class'] in dataset[section]:
                dataset[section][ cell['class'] ].append( cell.text )
            else:
                dataset[section][ cell['class'] ] = [ cell.text ]

pprint(dataset)

产地：

{u'HEADER 1': {u'data_point_1': [u'DATA11', u'DATA21', u'DATA31'],
               u'data_point_2': [u'DATA12', u'DATA22', u'DATA32'],
               u'data_point_3': [u'DATA12', u'DATA23', u'DATA33']},
 u'HEADER 2': {u'data_point_1': [u'DATA11', u'DATA21', u'DATA31'],
               u'data_point_2': [u'DATA12', u'DATA22', u'DATA32'],
               u'data_point_3': [u'DATA13', u'DATA23', u'DATA33']}}

编辑适应您的解决方案

您的代码很整洁，只有几个问题。您可以在contents或text的地方使用findAll - 我修复了以下内容：

soup = BeautifulSoup(html)
credits = soup.find('table')

section = ''
DATA_SET = {}

for i in credits.findAll('tr'):
    if i.get('class', '') == 'header':
        section = i.text
        DATA_SET[section] = {}
    else:
        DATA_SET[section]['data_point_1'] = i.find('td', {'class' : 'data_point_1'}).find('p').contents
        DATA_SET[section]['data_point_2'] = i.find('td', {'class' : 'data_point_2'}).find('p').contents
        DATA_SET[section]['data_point_3'] = i.find('td', {'class' : 'data_point_3'}).find('p').contents

print DATA_SET

请注意，如果连续的单元格具有相同的data_point类，则连续的行将替换之前的行。我怀疑这不是你的真实数据集中的问题，但这就是为什么你的代码会返回这个，缩写，结果：

{u'HEADER 2': {'data_point_2': [u'DATA32'],
               'data_point_3': [u'DATA33'],
               'data_point_1': [u'DATA31']},
 u'HEADER 1': {'data_point_2': [u'DATA32'],
               'data_point_3': [u'DATA33'],
               'data_point_1': [u'DATA31']}}

通过在python中的美丽汤的行表迭代

1 个答案: