python发起http请求，并解析返回的json字符串的小demo，方便以后用到。
#! /usr/bin/env python
# -*- coding:gbk -*-
import os
import sys
import json
import urllib
import urllib2
if __name__ == "__main__":
query_file = sys.argv[1]
query_index = 0
with open(query_file, 'r') as fp:
for line in fp:
query = line.rstrip()
query_index = query_index + 1
query_gbk = query
query = query.decode('gbk', 'ignore').encode('utf8', 'ignore')
url = 'http://10.42.141.12:8089/adrender?query=%s&ad_num=3&srcid=101'\\
'&ip=172.22.182.55&baiduid=61ABB404320C72436EB6B8352DFBB388:FG=1' % (query)
req = urllib2.urlopen(url)
page = req.read()
ddict = json.loads(page)
expid = ddict['expid']
sid = ddict['sid']
ad_num = ddict['response_adnum']
for i in range(0, ad_num):
output_html = '%s-%d.html' % (query_gbk, i)
output = open(output_html, 'w')
ad = ddict['response_ads'][i].encode('utf8', 'ignore')
output.write('<html>\')
output.write('<head>\ <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">\<head>\')
output.write("%s" % (ad))
output.write('\</html>\')
output.close()