gzip解压压缩的字符串数据

import urllib2
from StringIO import StringIO
import gzip

def loadData(url):
request = urllib2.Request(url)
request.add_header('Accept-encoding', 'gzip')
response = urllib2.urlopen(request)
if response.info().get('Content-Encoding') == 'gzip':
print 'gzip enabled'
buf = StringIO(response.read())
f = gzip.GzipFile(fileobj=buf)
data = f.read()
else:
data = response.read()
return data