Python有条件地将类添加到< td> HTML表中的标签 [英] Python Conditionally Add Class to <td> Tags in HTML Table
问题描述
我有一些csv文件形式的数据，我正在将这些数据读入Python并使用Pandas转换为HTML表.
I have some data in the form of a csv file that I'm reading into Python and converting to an HTML table using Pandas.
这里有一些示例数据:
name threshold col1 col2 col3
A 10 12 9 13
B 15 18 17 23
C 20 19 22 25
和一些代码:
import pandas as pd
df = pd.read_csv("data.csv")
table = df.to_html(index=False)
这将创建以下HTML:
This creates the following HTML:
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th>name</th>
<th>threshold</th>
<th>col1</th>
<th>col2</th>
<th>col3</th>
</tr>
</thead>
<tbody>
<tr>
<td>A</td>
<td>10</td>
<td>12</td>
<td>9</td>
<td>13</td>
</tr>
<tr>
<td>B</td>
<td>15</td>
<td>18</td>
<td>17</td>
<td>23</td>
</tr>
<tr>
<td>C</td>
<td>20</td>
<td>19</td>
<td>22</td>
<td>25</td>
</tr>
</tbody>
</table>
否，如果它的值小于某个阈值，我想有条件地向html表中的每个单元格添加一个类.表中的每一行的阈值都不同.
No I want to conditionally add a class to each cell in the html table if its value is less than a certain threshold. The threshold is different for each row in the table.
因此，鉴于上述示例数据，我想向名称为A的单元格col2和名称为C的单元格col1添加一个类class ="custom".在CSS中，如果该单元格颜色为红色，则将其填充为红色具有自定义"类.
So given the example data above, I want to add a class, class="custom" to cell col2 with name A and to cell col1 with name C. In CSS, I will then fill the cell color as red if it has the "custom" class.
结果将类似于:
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th>name</th>
<th>threshold</th>
<th>col1</th>
<th>col2</th>
<th>col3</th>
</tr>
</thead>
<tbody>
<tr>
<td>A</td>
<td>10</td>
<td>12</td>
<td class="custom">9</td>
<td>13</td>
</tr>
<tr>
<td>B</td>
<td>15</td>
<td>18</td>
<td>17</td>
<td>23</td>
</tr>
<tr>
<td>C</td>
<td>20</td>
<td class="custom">19</td>
<td>22</td>
<td>25</td>
</tr>
</tbody>
</table>
如何使用美丽汤来做到这一点?
How can this be achieved using Beautiful Soup?
推荐答案
使用 BeautifulSoup ，您可以在标签attrs中添加一个类，就像在字典中设置键/值一样:
Using BeautifulSoup you can add a class to the tags attrs as you would set a key/value in a dictionary:
soup = BeautifulSoup(html,"html.parser")
for row in soup.select("tbody tr"):
tds = row.find_all("td")
if int(tds[3].text) < int(tds[1].text):
tds[3]["class"] = "custom"
if int(tds[2].text) < int(tds[1].text):
tds[2]["class"] = "custom"
使用您输入的html可以给您:
Which using your input html would give you:
<html><body><table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th>name</th>
<th>threshold</th>
<th>col1</th>
<th>col2</th>
<th>col3</th>
</tr>
</thead>
<tbody>
<tr>
<td>A</td>
<td>10</td>
<td>12</td>
<td class="custom">9</td>
<td>13</td>
</tr>
<tr>
<td>B</td>
<td>15</td>
<td>18</td>
<td>17</td>
<td>23</td>
</tr>
<tr>
<td>C</td>
<td>20</td>
<td class="custom">19</td>
<td>22</td>
<td>25</td>
</tr>
</tbody>
</table></body></html>
只要决定是否添加它，就使用它中的任何内容.
Just use whatever it is in the if that decides whether to add it or not.
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