Python 和 BS4 |获取所有具有特定文本内容的表格数据

Question

我对 Python 和网络抓取还很陌生，因此提出以下问题。

我只想获取其中包含特定内容的表格。

HTML 的外观如下:它不是此脚本中的第一个表，因此我想选择

    </TABLE></TD></TR>
    <TR>
    <TD COLSPAN=7 class='x2'>
    &nbsp;</TD>
    </TR>
    <TR>
    <TD style="vertical-align:bottom" class='x3'>
    EingangsdatumDMYY</TD>
    <TD style="vertical-align:bottom" class='x4'>
    Techniker</TD>
    <TD style="vertical-align:bottom" class='x5'>
    Techn.</TD>
    <TD style="vertical-align:bottom" class='x6'>
    Kunde</TD>
    <TD style="vertical-align:bottom" class='x7'>
    OffAuftrag</TD>
    <TD style="vertical-align:bottom" class='x8'>
    Planungsdatum</TD>
    <TD style="vertical-align:bottom" class='x8'>
    Herstellerreferenz</TD>
    </TR>
    <TR>
    <TD class='x9_0'>
    DATE </TD>
    <TD class='x10_0'>
    default</TD>
    <TD class='x11_0'>
    00000001</TD>
    <TD class='x12_0'>
    Company Name</TD>
    <TD class='x17_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product A**</TD>
    <TD class='x14_0'>
    &nbsp;</TD>
    <TD class='x15_0'>
    &nbsp;</TD>
    </TR>
    <TR>
    <TD class='x9_0'>
    DATE </TD>
    <TD class='x10_0'>
    default</TD>
    <TD class='x11_0'>
    00000001</TD>
    <TD class='x12_0'>
    Company Name</TD>
    <TD class='x18_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product B**</TD>
    <TD class='x14_0'>
    &nbsp;</TD>
    <TD class='x15_0'>
    &nbsp;</TD>
    </TR>
    <TR>
    <TD class='x9_0'>
    DATE </TD>
    <TD class='x10_0'>
    default</TD>
    <TD class='x11_0'>
    00000001</TD>
    <TD class='x12_0'>
    Company Name</TD>
    <TD class='x19_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product A**</TD>
    <TD class='x14_0'>
    &nbsp;</TD>
    <TD class='x15_0'>
    &nbsp;</TD>
    </TR>

我知道此代码中使用的 calsses 很奇怪，但它是生成的，因此无法更改。

现在是我用来通过 BS4 获取 HTML 的代码:

import urllib2
from bs4 import BeautifulSoup

# specify the url
quote_page = 'Website.html'

# query the website and return the html to the variable page
page = urllib2.urlopen(quote_page)


# parse the html using beautiful soup and store in variable `soup`
soup = BeautifulSoup(page, 'html.parser')
tables = soup.findChildren('table')

my_table = tables[1]
rows = my_table.findChildren(['th', 'tr'])

print my_table

现在的问题是:

我确实得到了第一行，但我想搜索整个网站并搜索其中包含文本“Product A”的每个表并将父级保存在数组中。

例如:代码完成后，输出将是:

<TD class='x17_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product A**</TD>

<TD class='x19_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product A**</TD>

所以代码必须:1) 搜索 HTML 并搜索文本“Product A”2) 获取父标签并将其保存在变量中。3) 重复整个 HTML。

我感激地接受每一个提示 -

谢谢并致以最诚挚的问候雅尼克·L.

Answer 1

您可以在 Bs4 中使用正则表达式来查找包含特定文本的元素。

如果你想搜索所有包含特定字符串的td，你需要这个

import re
from bs4 import BeautifulSoup
page = '''

    <TR>
    <TD COLSPAN=7 class='x2'>
    &nbsp;</TD>
    </TR>
    <TR>
    <TD style="vertical-align:bottom" class='x3'>
    EingangsdatumDMYY</TD>
    <TD style="vertical-align:bottom" class='x4'>
    Techniker</TD>
    <TD style="vertical-align:bottom" class='x5'>
    Techn.</TD>
    <TD style="vertical-align:bottom" class='x6'>
    Kunde</TD>
    <TD style="vertical-align:bottom" class='x7'>
    OffAuftrag</TD>
    <TD style="vertical-align:bottom" class='x8'>
    Planungsdatum</TD>
    <TD style="vertical-align:bottom" class='x8'>
    Herstellerreferenz</TD>
    </TR>
    <TR>
    <TD class='x9_0'>
    DATE </TD>
    <TD class='x10_0'>
    default</TD>
    <TD class='x11_0'>
    00000001</TD>
    <TD class='x12_0'>
    Company Name</TD>
    <TD class='x17_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product A**</TD>
    <TD class='x14_0'>
    &nbsp;</TD>
    <TD class='x15_0'>
    &nbsp;</TD>
    </TR>
    <TR>
    <TD class='x9_0'>
    DATE </TD>
    <TD class='x10_0'>
    default</TD>
    <TD class='x11_0'>
    00000001</TD>
    <TD class='x12_0'>
    Company Name</TD>
    <TD class='x18_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product B**</TD>
    <TD class='x14_0'>
    &nbsp;</TD>
    <TD class='x15_0'>
    &nbsp;</TD>
    </TR>
    <TR>
    <TD class='x9_0'>
    DATE </TD>
    <TD class='x10_0'>
    default</TD>
    <TD class='x11_0'>
    00000001</TD>
    <TD class='x12_0'>
    Company Name</TD>
    <TD class='x19_0'>
    1000000    ,STATUS, TECH, DATE TIME, **Product A**</TD>
    <TD class='x14_0'>
    &nbsp;</TD>
    <TD class='x15_0'>
    &nbsp;</TD>
    </TR>
'''
soup = BeautifulSoup(page, 'html.parser')
tables = soup.findChildren('td', text=re.compile(r'Product A'))
print(tables)