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  Traceback (most recent call last): File "xueqiu.py", line 22, in  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