Examples of using the html parser
Miki Tebeka
miki.tebeka at zoran.com
Thu Mar 4 06:17:43 EST 2004
Hello Boogie,
> Were can I find examples of the usege of the html parser class?
Here is what I do to find the current price of a quote in Yahoo!
class Parser(HTMLParser):
'''HTML Parser to get quote value'''
def __init__(self, quote):
HTMLParser.__init__(self)
self.state = "START"
self.value = ERR_VALUE
self.quote = quote.upper()
def handle_starttag(self, tag, attrs):
'''Handle start tag'''
if self.state == "AFTER_START" and tag == "b":
self.state = "GET"
def handle_data(self, data):
'''Handle tag data'''
if self.state == "START" and data == "Last Trade:":
self.state = "AFTER_START"
elif self.state == "GET":
try:
self.value = float(data)
except ValueError:
self.value = ERR_VALUE
self.state = "DONE"
def get_quote(quote):
'''Get quote prices'''
p = Parser(quote)
p.feed(urlopen("http://finance.yahoo.com/q?s=%s" %
quote.upper()).read())
return p.value
HTH.
Miki
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