python Post方式发起http请求 使用百度接口地理编码

import os
import httplib
import json
import urllib

baiduapi="api.map.baidu.com:80"
src="/geocoder/v2/?address=addressname&output=json&ak=yourkey"

def load2(name):
    try:
        params = urllib.urlencode({
            'spam': 1,
            'eggs': 2,
            'bacon': 0
        })
        headers = {
            "Content-type": "application/x-www-form-urlencoded",
            "Accept": "text/plain"
        }
        conn = httplib.HTTPConnection(baiduapi)
        conn.request("POST", src.replace("addressname",name), params, headers)
        response = conn.getresponse()
        print response.status, response.reason
        data = response.read()
        return data
        conn.close()
    except Exception ,e:
        print e
        return ""
    finally:
        name=""