root/pygooglecalc/pygooglecalc.py

import os
import urllib

from BeautifulSoup import BeautifulSoup as bs

def download_page(definition):
    os.system('wget -q --user-agent= -Oyo http://www.google.com.au/search?q=%s' \
        % urllib.quote(definition))
    return open('yo').read()

def get_definition(definition):
    data = download_page(definition)
    soup = bs(data)
    answer = soup.find('h2', {'class': 'r'})
    if not answer:
        return None
    try:
        answer = answer.font.b
    except AttributeError:
        return None
    answer = strip_ml_tags(str(answer))
    return answer

def strip_ml_tags(in_text):
        """Description: Removes all HTML/XML-like tags from the input text.
        Inputs: s --> string of text
        Outputs: text string without the tags
        
        # doctest unit testing framework

        >>> test_text = "Keep this Text <remove><me /> KEEP </remove> 123"
        >>> strip_ml_tags(test_text)
        'Keep this Text  KEEP  123'
        """
        # convert in_text to a mutable object (e.g. list)
        s_list = list(in_text)
        i,j = 0,0
        
        while i < len(s_list):
                # iterate until a left-angle bracket is found
                if s_list[i] == '<':
                        while s_list[i] != '>':
                                # pop everything from the the left-angle bracket until the
                # right-angle bracket
                                s_list.pop(i)
                                
                        # pops the right-angle bracket, too
                        s_list.pop(i)
                else:
                        i=i+1
                        
        # convert the list back into text
        join_char=''
        return join_char.join(s_list)