python3 post 提交输出结果 “true”是怎么回事

1、途虎数据怎么爬取，弄了半天没有弄懂

2、网址：http://by.tuhu.cn/baoyang/Index.html?pid=VE-GM-S07BT&n=2013&pl=1.5L

3、这个是我的url

4、这个是我的表单

5、代码

import urllib.request
import urllib.parse

url = "http://by.tuhu.cn/baoyang/RecordUserOperation.html"
user_agent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36'
values ={'operationDescription':'scpan','isBaoYangType':'true','isCheckedBaoYangService':'true'}

headers = {'User-Agent':user_agent}
data = urllib.parse.urlencode(values).encode(encoding='UTF8')
req = urllib.request.Request(url,data,headers)
response = urllib.request.urlopen(req)
the_page = response.read()

print(the_page.decode("utf8"))

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是不是因为页面404?