新手这里，简单的直接抓取一个页面也报错，帮忙看下
url = 'https://xueqiu.com/stock/f10/finmainindex.json'
user_agent = 'Mozilla/5.0'
values = {'symbol' : 'SZ000001', 'page' : '1','size' : '1' }
headers = { 'User-Agent' : user_agent }
data = urllib.urlencode(values)
print data
request = urllib2.Request(url, data, headers)
print request
response = urllib2.urlopen(request)
page = response.read()
print page 报错如下，
(flask)[root@centos7 xueqiu]# python xueqiu.py
symbol=SZ000001&page=1&size=1
<urllib2.Request instance at 0x7f7e6b4f81b8>
Traceback (most recent call last):
File "xueqiu.py", line 22, in <module>
response = urllib2.urlopen(request)
File "/usr/local/pythonbrew/pythons/Python-2.7.10/lib/python2.7/urllib2.py", line 154, in urlopen
return opener.open(url, data, timeout)
File "/usr/local/pythonbrew/pythons/Python-2.7.10/lib/python2.7/urllib2.py", line 437, in open
response = meth(req, response)
File "/usr/local/pythonbrew/pythons/Python-2.7.10/lib/python2.7/urllib2.py", line 550, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/local/pythonbrew/pythons/Python-2.7.10/lib/python2.7/urllib2.py", line 475, in error
return self._call_chain(*args)
File "/usr/local/pythonbrew/pythons/Python-2.7.10/lib/python2.7/urllib2.py", line 409, in _call_chain
result = func(*args)
File "/usr/local/pythonbrew/pythons/Python-2.7.10/lib/python2.7/urllib2.py", line 558, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 400: Bad Request
