Deep Learning with Shogi AI on Mac and Google Colab Chapters 1-6

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Chapter 6 Deep Learning Framework

Warning of chainer and numpy

Importing Chainer and Numpy on iMac

import numpy
import chainer

Warning appears. It is recommended to use other BLAS like OpenBLAS with numpy.

/Users/xxx/Library/Python/3.8/lib/python/site-packages/chainer/_environment_check.py:33: UserWarning: Accelerate has been detected as a NumPy backend library.
vecLib, which is a part of Accelerate, is known not to work correctly with Chainer.
We recommend using other BLAS libraries such as OpenBLAS.
For details of the issue, please see
https://docs.chainer.org/en/stable/tips.html#mnist-example-does-not-converge-in-cpu-mode-on-mac-os-x.

Please be aware that Mac OS X is not an officially supported OS.

  warnings.warn('''\

Insert OpenBLAS according to the official page. https://docs.chainer.org/en/stable/tips.html#mnist-example-does-not-converge-in-cpu-mode-on-mac-os-x.

Use Homebrew to install OpenBLAS.

$ brew install openblas

Uninstall existing NumPy installation

$ pip uninstall numpy

You’ll to create a file called .numpy-site.cfg in your home (~/) directory with the following:

[openblas]
libraries = openblas
library_dirs = /usr/local/opt/openblas/lib
include_dirs = /usr/local/opt/openblas/include

Install NumPy from the source code

pip install --no-binary :all: numpy

Confirm NumPy has been installed with OpenBLAS by running this command:

$ python -c "import numpy; print(numpy.show_config())"

You should see the following information:

blas_mkl_info:
  NOT AVAILABLE
blis_info:
  NOT AVAILABLE
openblas_info:
  libraries = ['openblas', 'openblas']
  library_dirs = ['/usr/local/opt/openblas/lib']
  language = c
  define_macros = [('HAVE_CBLAS', None)]
  runtime_library_dirs = ['/usr/local/opt/openblas/lib']
 ...

Once this is done, you should be able to import chainer without OpenBLAS errors.

result

blas_mkl_info:
  NOT AVAILABLE
blis_info:
  NOT AVAILABLE
openblas_info:
    libraries = ['openblas', 'openblas']
    library_dirs = ['/usr/local/opt/openblas/lib']
    language = c
    define_macros = [('HAVE_CBLAS', None)]
blas_opt_info:
    libraries = ['openblas', 'openblas']
    library_dirs = ['/usr/local/opt/openblas/lib']
    language = c
    define_macros = [('HAVE_CBLAS', None)]
lapack_mkl_info:
  NOT AVAILABLE
openblas_lapack_info:
    libraries = ['openblas', 'openblas']
    library_dirs = ['/usr/local/opt/openblas/lib']
    language = c
    define_macros = [('HAVE_CBLAS', None)]
lapack_opt_info:
    libraries = ['openblas', 'openblas']
    library_dirs = ['/usr/local/opt/openblas/lib']
    language = c
    define_macros = [('HAVE_CBLAS', None)]

Now import chainer and import numpy no longer give an error.

Supplement For .numpy-site.cfg, just create a text file with 4 lines as officially written and save it in your home directory with the name .numpy-site.cfg. Files starting with "." Are hidden files. You can show / hide with command + shift +. Note that if you delete this file, you will get an error again.