Is there a clean way to get the n-th column of an html table using BeautifulSoup?

Say we look at the first table in a page, so:

table = BeautifulSoup(...).table

the rows can be scanned with a clean for-loop:

for row in table:
    f(row)

But for getting a single column things get messy.

My q开发者_JAVA百科uestion: is there an elegant way to extract a single column, either by its position, or by its 'name' (i.e. text that appears in the first row of this column)?

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lxml is many times faster than BeautifulSoup, so you might want to use that.

from lxml.html import parse
doc = parse('http://python.org').getroot()
for row in doc.cssselect('table > tr'):
    for cell in row.cssselect('td:nth-child(3)'):
         print cell.text_content()

Or, instead of looping:

rows = [ row for row in doc.cssselect('table > tr') ]
cells = [ cell.text_content() for cell in rows.cssselect('td:nth-child(3)') ]
print cells