Cython compiling error while installing

[minoriinoue]

Hi again :)

I would like to try out your One Class Random Forest Classifier (I read your paper as well).
However, in installing the code, I get some errors related to Cython files.

For example,

Do you know the problem or is there something I'm doing wrong?

Best,
Minori

[RomainBrault]

@ngoix have you modified this file (fast_dict.pxd)? If not it means that the error comes from scikit itself.
@minoriinoue could you tell us your numpy and cython version?

[minoriinoue]

Thanks for the reply, @RomainBrault :)
Versions should be:
Numpy version: 1.13.3
cython version: 0.27.3

[RomainBrault]

Ok it seems that the error comes from gcc-7 and higher (at the time it has been tested again gcc-6/gcc-5). Note that sklean 0.19 also fixed in the same file a bug related to clang.

@minoriinoue In the file sklearn/utils/fast_dict.pxd you should add right below the line

cimport numpy as np

a new line

import numpy as np

I proposed a pull request fixing this available in the branch cythonize-patch-1. Waiting for feedback on this fix before merge.

[RomainBrault]

NB: sklearn 0.20 proposed to simply remove the DTYPE and ITYPE lines instead of the 'import numpy as np'.