Beta wikipedia voice browser for android sl4a. Say a topic or "more" to hear more about previous topic

wikivoice.py

import urllib
import android
import string
from HTMLParser import HTMLParser

class MLStripper(HTMLParser):
    def __init__(self):
        self.reset()
        self.fed = []
    def handle_data(self, d):
        self.fed.append(d)
    def get_data(self):
        return ''.join(self.fed)

def strip_tags(html):
    s = MLStripper()
    s.feed(html)
    return s.get_data()

def find_nth(haystack, needle, n):
    start = haystack.find(needle)
    while start >= 0 and n > 1:
        start = haystack.find(needle, start+len(needle))
        n -= 1
    return start
    
def lookup(topic, paragraph=1):
    topic = topic.replace(" ", "_")
    page = urllib.urlopen("http://en.m.wikipedia.org/wiki/"+topic);
    content = page.read();
    page.close();
    content = content[content.find('<div id="content">'):content.find('<div class="section">')]
    content = strip_tags(content[find_nth(content, '<p>', paragraph):find_nth(content,'</p>',paragraph)])
    droid.ttsSpeak(content)
    
    
droid = android.Android()
input = ""
tmp = ""
p = 1
while(1):
    if(not droid.ttsIsSpeaking().result):
        tmp = input
        input = droid.recognizeSpeech("Search Wikipedia...").result
        if(input != "more"):
            lookup(input)
            p=1
        else:
            input = tmp
            p+=1
            lookup(input, p)