title: cython_bbox.so: undefined symbol: _Py_ZeroStruct
body: <p>I try to do all these steps because I want a different version python 3.5 on linux to run the code in this example  <a href="https://docs.microsoft.com/en-us/cognitive-toolkit/Object-Detection-using-Fast-R-CNN" rel="noreferrer">https://docs.microsoft.com/en-us/cognitive-toolkit/Object-Detection-using-Fast-R-CNN</a></p>
  
  <p>If you need a different version you can compile it following these steps:</p>
  
  <pre><code>git clone --recursive https://github.com/rbgirshick/fast-rcnn.git
  cd $FRCN_ROOT/lib
  make
  python setup.py build_ext --inplace.
  copy the generated cython_bbox and cython_nms binaries from 
  $FRCN_ROOT/lib/utils to $CNTK_ROOT/Examples/Image/Detection/FastRCNN/fastRCNN/utils
  **Error**
  Traceback (most recent call last):
    File "C1_DrawBboxesOnImages.py", line 10, in &lt;module&gt;
      from cntk_helpers import *
    File "/home/tftuts/Desktop/tensorflow/CNTK-master/Examples/Image/Detection/FastRCNN/cntk_helpers.py", line 13, in &lt;module&gt;
      from fastRCNN.nms import nms as nmsPython
    File "/home/tftuts/Desktop/tensorflow/CNTK-master/Examples/Image/Detection/FastRCNN/fastRCNN/__init__.py", line 7, in &lt;module&gt;
      from .imdb import imdb
    File "/home/tftuts/Desktop/tensorflow/CNTK-master/Examples/Image/Detection/FastRCNN/fastRCNN/imdb.py", line 16, in &lt;module&gt;
      from .utils.cython_bbox import bbox_overlaps
  ImportError: /home/tftuts/Desktop/tensorflow/CNTK-master/Examples/Image/Detection/FastRCNN/fastRCNN/utils/cython_bbox.so: undefined symbol: _Py_ZeroStruct
  </code></pre>
  
  <p>please any one can help me. what means </p>
  
  <pre><code>cython_bbox.so: undefined symbol: _Py_ZeroStruct 
  </code></pre>
  
  <p>and how resolve this problem.</p>