Can you provide examples of parsing HTML?

Question

How do you parse HTML with a variety of languages and parsing libraries?

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When answering:

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Answer 1

language: Python
library: HTMLParser

#!/usr/bin/python

from HTMLParser import HTMLParser

class FindLinks(HTMLParser):
    def __init__(self):
        HTMLParser.__init__(self)

    def handle_starttag(self, tag, attrs):
        at = dict(attrs)
        if tag == 'a' and 'href' in at:
            print at['href']


find = FindLinks()

html = ""
for link in ("foo", "bar", "baz"):
    html += '%s' % (link, link)
html += ""

find.feed(html)