TypeError:“set”对象在python中不可使用REQUESTS模块订阅

Question

我对python和'requests'模块都不熟悉，stackoverflow对我来说很简单。:) 如果有人能给我一些关于这对我的代码意味着什么的提示，我将不胜感激。

代码：

import requests

url = 'https://somewebsite.com/svc/api/json/loginUser'


headers = {'User-Agent':'Python _dopost() method',
    'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Charset':'Shift_JIS,utf-8;q=0.7,*;q=0.7',
    'Accept-Encoding':'gzip,deflate',
    'Content-Type':'/plain; charset=UTF-8'}

data = {'<soapenv:Envelope><soapenv:Body><loginUser><email>tacoflavoredkisses@yum.com</email><password>password</password><setcookie>1</setcookie><remember>1</remember></loginUser></soapenv:Body></soapenv:Envelope>'}

r = requests.post(url, data=data, headers=headers)

错误：TypeError:“set”对象不可订阅

有一个很长的python错误，这里有一个片段，希望足够了。

TypeError                                 Traceback (most recent call last)
/Library/Python/2.7/site-packages/ipython-0.13.1-py2.7.egg/IPython/utils/py3compat.pyc in execfile(fname, *where)
176             else:
177                 filename = fname
--> 178             __builtin__.execfile(filename, *where)

 21 
 22 payload = {'<soapenv:Envelope><soapenv:Body><loginUser><email>tacoflavoredkisses@yum.com</email><password>password</password><setcookie>1</setcookie><remember>1</remember></loginUser></soapenv:Body></soapenv:Envelope>'}
---> 23 r = requests.post(url, data=data, headers=headers)
 24 
 25 print r.status_code

/Library/Python/2.7/site-packages/requests-1.1.0-py2.7.egg/requests/api.pyc in post(url, data, **kwargs)
 85     """
 86 
---> 87     return request('post', url, data=data, **kwargs)
/Library/Python/2.7/site-packages/requests-1.1.0-py2.7.egg/requests/api.pyc in request(method, url, **kwargs)
 42 
 43     session = sessions.Session()
---> 44     return session.request(method=method, url=url, **kwargs)
/Library/Python/2.7/site-packages/requests-1.1.0-py2.7.egg/requests/sessions.pyc in request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert)
277 
278         # Send the request.
--> 279         resp = self.send(prep, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
/Library/Python/2.7/site-packages/requests-1.1.0-py2.7.egg/requests/sessions.pyc in send(self, request, **kwargs)
372         """Send a given PreparedRequest."""
373         adapter = self.get_adapter(url=request.url)
--> 374         r = adapter.send(request, **kwargs)