How to find tags with only certain attributes - BeautifulSoup

Question

How would I, using BeautifulSoup, search for tags containing ONLY the attributes I search for?

For example, I want to find all

Answer 1

As explained on the BeautifulSoup documentation

You may use this :

soup = BeautifulSoup(html)
results = soup.findAll("td", {"valign" : "top"})

EDIT :

To return tags that have only the valign="top" attribute, you can check for the length of the tag attrs property :

from BeautifulSoup import BeautifulSoup

html = '.....\
        .......\
        .....'

soup = BeautifulSoup(html)
results = soup.findAll("td", {"valign" : "top"})

for result in results :
    if len(result.attrs) == 1 :
        print result

That returns :

.....