python 3.5.1 import gpu_nms error (undefined symbol: _Py_ZeroStruct)

Hi all, After running the demo python3 tools/demo.py

The error just occures

...
from nms.gpu_nms import gpu_nms
ImportError: /home/ubuntu/Desktop/py-faster-rcnn/tools/../lib/nms/gpu_nms.so: undefined symbol: _Py_ZeroStruct

I ran with the latest version of python3 (3.5.1-3). caffe and pycaffe were both installed correctly.

Please help me to solve it. There hasn't been a good solution for it.