파이썬 구글 이미지 검색(python google image search)

import urllib

class MyOpener(urllib.FancyURLopener):
   version = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; it; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11'

def image_addr(word):
   urllib._urlopener = MyOpener()
   f = urllib.urlopen('http://images.google.com/images?hl=ko&source=hp&q='+word+'&btnG=%EC%9D%B4%EB%AF%B8%EC%A7%80+%EA%B2%80%EC%83%89&gbv=2&aq=f&oq=')
   extension = '.jpg'
   html = f.read()
   pos2 = html.find(extension)
   pos1 = html[0:pos2].rfind('http://')
   return html[pos1:pos2+len(extension)]

if __name__=='__main__':
   print image_addr('south')