Python 的 requests 库上传文件报错

return self.request('POST', url, data=data, json=json, **kwargs)
File "/Users/libin/pyspider_env/lib/python2.7/site-packages/requests/sessions.py", line 488, in request
resp = self.send(prep, **send_kwargs)
File "/Users/libin/pyspider_env/lib/python2.7/site-packages/requests/sessions.py", line 609, in send
r = adapter.send(request, **kwargs)
File "/Users/libin/pyspider_env/lib/python2.7/site-packages/requests/adapters.py", line 473, in send
raise Connecti onError(err, request=request)
requests.exceptions.Connecti onError: ('Connection aborted.', error(32, 'Broken pipe'))

谷歌了一下，也没发现什么解决的方法