Web scraping google results

[davehr...@gmail.com]

How can I web scrape Google search results using BeautifulSoup? My code does't print output. Is it a problem with the 'LinkDictionary' ? 

from bs4 import BeautifulSoup

import urllib, urllib2

def google_scrape(query):

    address = "http://www.google.com/search?q=%s&num=100&hl=en&start=0" % (urllib.quote_plus(query))

    request = urllib2.Request(address, None, {'User-Agent':'Mosilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11'})

    urlfile = urllib2.urlopen(request)

    page = urlfile.read()

    soup = BeautifulSoup(page)

    linkdictionary = {}

    for li in soup.findAll('li', attrs={'class':'g'}):

        sLink = li.find('a')

        print sLink['href']

        sSpan = li.find('span', attrs={'class':'st'})

        print sSpan

    return linkdictionary

if __name__ == '__main__':

    links = google_scrape('beautifulsoup')