使用Python和Beautifulsoup如何在div中选择所需的表？

Question

我希望能够选择包含"应付账款"文本的表格,但我没有得到我正在尝试的任何地方,我几乎猜测使用findall.有人能告诉我我会怎么做吗？

例如,这就是我的开始:

<div>
<tr>
<td class="lft lm">Accounts Payable
</td>
<td class="r">222.82</td>
<td class="r">92.54</td>
<td class="r">100.34</td>
<td class="r rm">99.95</td>
</tr>
<tr>
<td class="lft lm">Accrued Expenses
</td>
<td class="r">36.49</td>
<td class="r">33.39</td>
<td class="r">31.39</td>
<td class="r rm">36.47</td>
</tr>
</div>

这就是我希望得到的结果:

<tr>
<td class="lft lm">Accounts Payable
</td>
<td class="r">222.82</td>
<td class="r">92.54</td>
<td class="r">100.34</td>
<td class="r rm">99.95</td>
</tr>

Answer 1

您可以选择类lft lm的td元素,然后检查element.string以确定您是否具有"应付帐款"td:

import sys
from BeautifulSoup import BeautifulSoup

# where so_soup.txt is your html
f = open ("so_soup.txt", "r")
data = f.readlines ()
f.close ()

soup = BeautifulSoup ("".join (data))

cells = soup.findAll('td', {"class" : "lft lm"})
for cell in cells:
    # You can compare cell.string against "Accounts Payable" 
    print (cell.string)

如果您想检查以下应付帐款的兄弟姐妹,您可以使用以下内容:

if (cell.string.strip () == "Accounts Payable"):
    sibling = cell.findNextSibling ()
    while (sibling):
        print ("\t" + sibling.string)
        sibling = sibling.findNextSibling ()

更新编辑

如果您想打印原始HTML,只是为了跟随Accounts Payable元素的兄弟姐妹,这是代码:

lines = ["<tr>"]
for cell in cells:
    lines.append (cell.prettify().decode('ascii'))
    if (cell.string.strip () == "Accounts Payable"):
        sibling = cell.findNextSibling ()
        while (sibling):
            lines.append (sibling.prettify().decode('ascii'))
            sibling = sibling.findNextSibling ()
lines.append ("</tr>")

f = open ("so_soup_out.txt", "wt")
f.writelines (lines)
f.close ()