Faiss: undefined symbol: PyCObject_Type

[JiqiangLiu]

Hi, the following error has been arised when I run the command python -c "import faiss" . Could you give me some suggestions?

 Failed to load GPU Faiss: /mnt/disk-c/mark/faiss-2/faiss/python/_swigfaiss_gpu.so: undefined symbol: PyCObject_Type
Faiss falling back to CPU-only.
Traceback (most recent call last):
  File "/mnt/disk-c/mark/faiss-2/faiss/python/faiss/swigfaiss_gpu.py", line 14, in swig_import_helper
    return importlib.import_module(mname)
  File "/home/mark/Python-3.6.4/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 658, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 571, in module_from_spec
  File "<frozen importlib._bootstrap_external>", line 922, in create_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
ImportError: /mnt/disk-c/mark/faiss-2/faiss/python/faiss/_swigfaiss_gpu.so: undefined symbol: PyCObject_Type
During handling of the above exception, another exception occurred: 

[beauby]

Did you compile faiss yourself? If so, could you share your makefile.inc?

[JiqiangLiu]

Yes, this is my makefile.inc, makefile.inc.txt.

[texastony]

I had the same error. I discovered that while PYTHONFLAGS were pointing to 2.7, python on my system defaulted at the time to anaconda's python3.6. You could check for that consistency.

[JiqiangLiu]

Thank you for your help. I'll check it.

[mdouze]

No activity. Closing.

[mattg-sp]

I encountered this problem, but it turned out I had run configure with the following environment variables set:

CFLAGS=-I/usr/include/python2.7
CXXFLAGS=-I/usr/include/python2.7

The fix was instead to use the corresponding python3 paths and to specify the option --with-python=python3, when running configure.