Can I combine two 'findAll' search blocks in beautifulsoup, into one?

Question

Can I combine these two blocks into one:

Edit: Any other method than combining loops like Yacoby did in the answer.

for tag in soup.findAll(['script', 'form']):
    tag.extract()

for tag in soup.findAll(id="footer"):
    tag.extract()

Also can I multiple blocks into one:

for tag in soup.findAll(id="footer"):
    tag.extract()

for tag in soup.findAll(id="content"):
    tag.extract()

for tag in soup.findAll(id="links"):
    tag.extract()

or may be there is some lambda expression where I can check whether in array, or any other simpler method.

Also how do I find tags with attribute class, as class is reserved keyword:

EDIT: this part is solved by the soup.findAll(attrs={'class': 'noprint'}):

for tag in soup.findAll(class="noprint"):
    tag.extract()

Answer 1

You can pass functions to .findall() like this:

soup.findAll(lambda tag: tag.name in ['script', 'form'] or tag['id'] == "footer")

But you might be better off by first building a list of tags and then iterating over it:

tags = soup.findAll(['script', 'form'])
tags.extend(soup.findAll(id="footer"))

for tag in tags:
    tag.extract()

If you want to filter for several ids, you can use:

for tag in soup.findAll(lambda tag: tag.has_key('id') and
                                    tag['id'] in ['footer', 'content', 'links']):
    tag.extract()

A more specific approach would be to assign a lambda to the id parameter:

for tag in soup.findAll(id=lambda value: value in ['footer', 'content', 'links']):
    tag.extract()

Answer 2

I don't know if BeautifulSoup can do it more elegantly, but you could merge the two loops like so:

for tag in soup.findAll(['script', 'form']) + soup.findAll(id="footer"):
    tag.extract()

You can find classes like so (Documentation):

for tag in soup.findAll(attrs={'class': 'noprint'}):
    tag.extract()

Answer 3

The answer to the second part of your question is right there in the documentation:

Searching by CSS class

The attrs argument would be a pretty obscure feature were it not for one thing: CSS. It's very useful to search for a tag that has a certain CSS class, but the name of the CSS attribute, class, is also a Python reserved word.

You could search by CSS class with soup.find("tagName", { "class" : "cssClass" }), but that's a lot of code for such a common operation. Instead, you can pass a string for attrs instead of a dictionary. The string will be used to restrict the CSS class.

from BeautifulSoup import BeautifulSoup
soup = BeautifulSoup("""Bob's <b>Bold</b> Barbeque Sauce now available in 
                   <b class="hickory">Hickory</b> and <b class="lime">Lime</a>""")

soup.find("b", { "class" : "lime" })
# <b class="lime">Lime</b>

soup.find("b", "hickory")
# <b class="hickory">Hickory</b>

Answer 4

links = soup.find_all('a',class_='external') ,we can pass class_ to filter based on class values

from bs4 import BeautifulSoup
from urllib.request import urlopen

with urlopen('http://www.espncricinfo.com/') as f:
    raw_data= f.read()
    soup= BeautifulSoup(raw_data,'lxml')
    # print(soup)
    links = soup.find_all('a',class_='external')
    for link in links:
        print(link)