python beautifulsoup 如何抓取不规则表格的内容

Question

在爬一个网站数据的时候发现，旧的页面采用的表格和现在的格式不一样，这到不算大问题，只是旧式表格采用的是表格格式并不规则。因网站登陆本身需要账号，就不提供网址了。
具体如下：
新式：

旧式：

在旧式表中中，列名行与数据第一行有6个td标签，其余仅有5个td标签。
表格中的tr标签与td标签均没有特别的属性用做区分。

目前我的处理方式是：
新式：
读列名行，按顺序做一个列表例如：['厂家'，'备注','单位','变化']。
之后每行数据 按顺序制作成一个字典例如{'厂家'：'ABC','备注'：'ABC'}
然后插入到我的数据库中。
旧式：
方法类似，只是我要每行 判断cells的数量 来确定读哪部分。

我的问题是：
请问 有没有更好的办法，将表格中的数据按照格式读取出来，甚至能处理旧式表格这样的布局？

旧式表格：

<tr style="height: 16.55pt">

    <td style="border-bottom: windowtext 1.5pt double; border-left: windowtext 1.5pt double; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 9.66%; padding-right: 5.4pt; height: 16.55pt; border-top: windowtext 1.5pt double; border-right: windowtext 1.5pt double; padding-top: 0cm" width="9%">
    <p style="text-align: center; layout-grid-mode: char" align="center">产品</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 16.55pt; border-top: windowtext 1.5pt double; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p style="text-align: left; layout-grid-mode: char" align="left">厂家</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 16.55pt; border-top: windowtext 1.5pt double; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p style="text-align: center; layout-grid-mode: char" align="center">元<span>/公斤</span></p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 16.55pt; border-top: windowtext 1.5pt double; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">涨<span>/跌</span></p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 16.55pt; border-top: windowtext 1.5pt double; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">产地</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 16.55pt; border-top: windowtext 1.5pt double; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; layout-grid-mode: char" align="center">备注</p>
    </td>
</tr>
<tr style="height: 9.3pt">
    <td rowspan="7" style="border-bottom: windowtext 1.5pt double; border-left: windowtext 1.5pt double; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 9.66%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="9%">
    <p style="text-align: center; layout-grid-mode: char" align="center">进</p>
    <p style="text-align: center; layout-grid-mode: char" align="center">口</p>
    <p style="text-align: center; layout-grid-mode: char" align="center">原</p>
    <p style="text-align: center; layout-grid-mode: char" align="center">生</p>
    <p style="text-align: center; layout-grid-mode: char" align="center">多</p>
    <p style="text-align: center; layout-grid-mode: char" align="center">晶</p>
    <p style="text-align: center; layout-grid-mode: char" align="center">硅</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p align="left">WackerChemie</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p align="center">480</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">-</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">德国</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; layout-grid-mode: char" align="center">&nbsp;</p>
    </td>
</tr>
<tr style="height: 9.3pt">
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p align="left">Hemlock Semiconductor</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p align="center">450</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">-</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">美国</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; layout-grid-mode: char" align="center">&nbsp;</p>
    </td>
</tr>
<tr style="height: 9.3pt">
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p align="left">Tokuyama Corporation</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p align="center">460</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">-</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">日本</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; layout-grid-mode: char" align="center">&nbsp;</p>
    </td>
</tr>
<tr style="height: 9.3pt">
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p align="left">MEMC Electronic Materials，Inc</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p align="center">450</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">-</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">美国</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; layout-grid-mode: char" align="center">&nbsp;</p>
    </td>
</tr>
<tr style="height: 9.3pt">
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p align="left">MitsubishiPolysilicon</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p align="center">460</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">-</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">日本</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; layout-grid-mode: char" align="center">&nbsp;</p>
    </td>
</tr>
<tr style="height: 9.3pt">
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p align="left">REC Group</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p align="center">430</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">-</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">美国</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 9.3pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; layout-grid-mode: char" align="center">&nbsp;</p>
    </td>
</tr>
<tr style="height: 14.55pt">
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 45.2%; padding-right: 5.4pt; height: 14.55pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="45%">
    <p align="left"><span style="color: black">DC Chemical</span></p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 13.4%; padding-right: 5.4pt; height: 14.55pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="13%">
    <p align="center">430</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 14.55pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%" valign="top">
    <p style="text-align: center; layout-grid-mode: char" align="center">-</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 11.7%; padding-right: 5.4pt; height: 14.55pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="11%">
    <p style="text-align: left; layout-grid-mode: char" align="left">韩国</p>
    </td>
    <td style="border-bottom: windowtext 1.5pt double; border-left: #f0f0f0; padding-bottom: 0cm; background-color: transparent; padding-left: 5.4pt; width: 10.02%; padding-right: 5.4pt; height: 14.55pt; border-top: #f0f0f0; border-right: windowtext 1.5pt double; padding-top: 0cm" width="10%">
    <p style="text-align: center; text-indent: 5.25pt; layout-grid-mode: char" align="center">&nbsp;</p>
    </td>
</tr>

。。我想把新式的表格也发出来。可惜这些里面各种属性太多了 超过限制了。

Answer 1

Ce serait plus simple si vous pouviez fournir le code source html~

---

Votre code source html est incomplet. Après avoir ajouté la balise <table>, collez-le directement dans Excel et il deviendra un tableau.

Si vous connaissez Excel, c'est facile à faire

---

python3

import pandas as pd

html = 'tab.html' # 你给的table源码

#默认pd会用 lxml 解析html
df = pd.read_html(html,header=0,encoding='utf8')[0]
print(df)
df2 = df.iloc[1:,0:-1]
df2.columns = df.columns.delete(0)
df2 = df2.append(df.iloc[0,1:])
df2['产品']=df.iat[0,0].replace(' ','')
df2.insert(0,'产品',df2.pop('产品'))
df2 = df2.sort_index()
print(df2)

Résultat :

        产品                             厂家 元/公斤 涨/跌  产地   备注
0  进口原生多晶硅                   WackerChemie  480   -  德国  NaN
1  进口原生多晶硅          Hemlock Semiconductor  450   -  美国  NaN
2  进口原生多晶硅           Tokuyama Corporation  460   -  日本  NaN
3  进口原生多晶硅  MEMC Electronic Materials，Inc  450   -  美国  NaN
4  进口原生多晶硅          MitsubishiPolysilicon  460   -  日本  NaN
5  进口原生多晶硅                      REC Group  430   -  美国  NaN
6  进口原生多晶硅                    DC Chemical  430   -  韩国  NaN

Answer 2

Apprenez les pandas
redad_html (url, match='caractères dans le tableau que vous voulez')
De cette façon, vous pouvez obtenir directement le contenu des données du tableau que vous souhaitez. Très cool.