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Easiest way to install numpy using LAPACK / BLAS?

I am on Ubuntu 14.04.

I would expect:

sudo apt-get install python-numpy

would work, but it doesn't ...

The way I tried to check is to do this locate blas

and not find anything that would seem relevant.

I need a solution that doesn't require compiling from source.

The perfect solution is what ubuntu repositories use.

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4 answers


On Ubuntu 14.04 and later, blas and lapack are installed as part of python-scipy and python3-scipy, so you need to install python-scipy. Open a terminal and enter:

sudo apt install python-scipy


This command will also install libblas3 (base implementations of basic algebraic algebra routines, shared library) and liblapack3 (linear algorithms library 3 - general version) as dependencies, and also install python-numpy as a dependency if you haven't already installed it.

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Have you tried using pip?

sudo pip install numpy


If you don't have pip install pip with instructions here

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I have very good experience with the anaconda package manager (it took me 1-2 hours to learn). It is easier to use than venv and more felixble than pip / env in my opinion. Once downloaded and configured, you have most of a package like numpy ready to go. So no more problems!

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numpy.show_config()

showed that I didn't have BLAS support even though it was python3-scipy

already installed. Uninstall and reinstall python3-scipy

and python3-numpy

fixed it:

sudo apt-get remove python3-scipy python3-numpy
sudo apt-get install python3-scipy pthon3-numpy

I now have LAPACK / BLAS support:

>>> numpy.show_config()
openblas_lapack_info:
  NOT AVAILABLE
mkl_info:
  NOT AVAILABLE
atlas_3_10_blas_threads_info:
  NOT AVAILABLE
lapack_info:
    libraries = ['lapack', 'lapack']
    language = f77
    library_dirs = ['/usr/lib']
atlas_3_10_blas_info:
  NOT AVAILABLE
openblas_info:
  NOT AVAILABLE
blas_opt_info:
    libraries = ['blas', 'blas']
    define_macros = [('NO_ATLAS_INFO', 1), ('HAVE_CBLAS', None)]
    library_dirs = ['/usr/lib']
    language = c
blas_info:
    libraries = ['blas', 'blas']
    language = c
    library_dirs = ['/usr/lib']
    define_macros = [('HAVE_CBLAS', None)]
blas_mkl_info:
  NOT AVAILABLE
atlas_info:
  NOT AVAILABLE
atlas_3_10_threads_info:
  NOT AVAILABLE
lapack_mkl_info:
  NOT AVAILABLE
atlas_blas_threads_info:
  NOT AVAILABLE
atlas_3_10_info:
  NOT AVAILABLE
atlas_threads_info:
  NOT AVAILABLE
atlas_blas_info:
  NOT AVAILABLE
lapack_opt_info:
    libraries = ['lapack', 'lapack', 'blas', 'blas']
    define_macros = [('NO_ATLAS_INFO', 1), ('HAVE_CBLAS', None)]
    library_dirs = ['/usr/lib']
    language = c
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