python解析排名最靠前的5条新闻

!/usr/bin/env python

try:
from io import BytesIO as StringIO
except ImportError:
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO

try:
from itertools import izip as zip
except ImportError:
pass

try:
from urllib2 import urlopen
except ImportError:
from urllib.request import urlopen

from pprint import pprint
from xml.etree import ElementTree

g = urlopen('http://news.google.com/news?topic=h&output=rss')
f = StringIO(g.read())
g.close()
tree = ElementTree.parse(f)
f.close()

def topnews(count=5):
pair = [None, None]
for elmt in tree.getiterator():
if elmt.tag == 'title':
skip = elmt.text.startswith('Top Stories')
if skip:
continue
pair[0] = elmt.text
if elmt.tag == 'link':
if skip:
continue
pair[1] = elmt.text
if pair[0] and pair[1]:
count -= 1
yield(tuple(pair))
if not count:
return
pair = [None, None]

for news in topnews():
pprint(news)