cython_bbox.so: undefined symbol: _Py_ZeroStruct

Question

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 https://docs.microsoft.com/en-us/cognitive-toolkit/Object-Detection-using-Fast-R-CNN

If you need a different version you can compile it following these steps:

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 <module>
    from cntk_helpers import *
  File "/home/tftuts/Desktop/tensorflow/CNTK-master/Examples/Image/Detection/FastRCNN/cntk_helpers.py", line 13, in <module>
    from fastRCNN.nms import nms as nmsPython
  File "/home/tftuts/Desktop/tensorflow/CNTK-master/Examples/Image/Detection/FastRCNN/fastRCNN/__init__.py", line 7, in <module>
    from .imdb import imdb
  File "/home/tftuts/Desktop/tensorflow/CNTK-master/Examples/Image/Detection/FastRCNN/fastRCNN/imdb.py", line 16, in <module>
    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

please any one can help me. what means

cython_bbox.so: undefined symbol: _Py_ZeroStruct 

and how resolve this problem.

Answer 1

This error message is typical when there's a version mismatch in Python modules. It could something like cython_bbox.so was compiled and linked against Python 2.7 and CNTK was compiled against Python 3.5. It's hard to say exactly what the reason is but you can try to do make inside a python environment that matches your CNTK version and see if that works.