import xml.parsers.expat

# 3 handler functions
def start_element(name, attrs):
    print 'Start element:', name, attrs
def end_element(name):
    print 'End element:', name
def char_data(data):
    print 'Character data:', repr(data)

p = xml.parsers.expat.ParserCreate()

p.StartElementHandler = start_element
p.EndElementHandler = end_element
p.CharacterDataHandler = char_data

p.Parse("""<?xml version="1.0"?>
<parent id="top"><child1 name="paul">Text goes here</child1>
<child2 name="fred">More text</child2>
</parent>""", 1)

# create a subclass and override the handler methods
class MyParser(xml.parsers.expat.ParserCreate()):
	def __init__(self):
		path = ""
	def StartElementHandler(self, tag, attrs):
		print tag
# instantiate the parser and fed it some HTML

parser = MyParser()
parser.Parse(out)

Traceback (most recent call last):
  File "D:\doorways\seo.py", line 13, in <module>
    class MyParser(xml.parsers.expat.ParserCreate()):
TypeError: Error when calling the metaclass bases
    cannot create 'pyexpat.xmlparser' instances
Для продолжения нажмите любую клавишу . . .

from HTMLParser import HTMLParser
from xml.parsers.expat import ParserCreate
print type(HTMLParser)
print type(ParserCreate)

output:
<type 'classobj'>
<type 'builtin_function_or_method'>

from xml.parsers.expat import ParserCreate

class MyParser:
	def __init__(self):
		self.p = ParserCreate()
		self.p.StartElementHandler = self.start_element
	
	def start_element(self, tag, attrs):
		print tag
		
	def feed(self, data):
		self.p.Parse(data, 1)
		
# instantiate the parser and fed it some HTML

parser = MyParser()
parser.feed(data)