Confusion to read html table contents using BeautifulSoup?

问题

here is the HTML content:

<table cellspacing="1" cellpadding="0" class="data">
<tr class="colhead">
            <th colspan="3">Expression</th>
        </tr>
        <tr class="colhead">
            <th>Task</th>
            <th>Action</th>
            <th>List</th>
</tr>           
<tr class="rowLight">
    <td width="40%">
            Task1
        </td>
        <td width="20%">
             Assigned to 
        </td>
        <td width="40%">
             Harry
    </td>

</tr>           
<tr class="rowDark">
     <td width="40%">
                    Task2
                </td>
                <td width="20%">
                     Rejected by 
                </td>
                <td width="40%">
                    Lopa 
                </td>
</tr>

<tr class="rowLight">
    <td width="40%">
            Task5
        </td>
        <td width="20%">
             Accepted By 
        </td>
        <td width="40%">
            Mathew
        </td>
</tr>

Now I have to get the values as below : (the below table is nothing but an Excel table,that i will build up,once reached to the values.)

Task    Action        List
Task1   Assigned to   Harry
Task2   Rejected by   Lopa
Task5   Accepted By   Mathew

A lay man solution what I know as below:

   from bs4 import BeautifulSoup
   soup = BeautifulSoup(source_URL)

alltables = soup.findAll( "table", {"border":"2", "width":"100%"} )

t = [x for x in soup.findAll('td')]

[x.renderContents().strip('\n') for x in t]

But in my above HTML content such structure not present,so how to approach? Please guide me here!

回答1:

Use .stripped_strings to get the 'interesting' text from a table row:

rows = table.find_all('tr', class_=('rowLight', 'rowDark'))
for row in rows:
    print list(row.stripped_strings)

This outputs:

[u'Task1', u'Assigned to', u'Harry']
[u'Task2', u'Rejected by', u'Lopa']
[u'Task5', u'Accepted By', u'Mathew']

or, to pull everything into one list of lists (with, by request, the last row not included):

data = [list(r.stripped_strings) for r in rows[:-1]]

which becomes:

data = [[u'Task1', u'Assigned to', u'Harry'], [u'Task2', u'Rejected by', u'Lopa']]

The result of .find_all(), a ResultSet, acts just like a Python list and you can slice it at will to ignore certain rows, for example.

来源：https://stackoverflow.com/questions/14156546/confusion-to-read-html-table-contents-using-beautifulsoup

标签

python

python-2.7

beautifulsoup