What is the easiest way to install numpy with LAPACK/BLAS?

Question

I'm on an Ubuntu 14.04.

I would have expected doing:

sudo apt-get install python-numpy

would've worked but it isn't the case...

The way I tried to check is by doing locate blas and found nothing that seemed relevant.

I would like a solution that doesn't involve me compiling from source.

The ideal solution is something that uses the ubuntu repos.

Answer 1

In 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. In Ubuntu 18.04 and earlier open the terminal and type:

sudo apt install python-scipy  

This command will also install libblas3 (Basic Linear Algebra Subprograms reference implementations, shared library) and liblapack3 (Library of linear algebra routines 3 - shared version) as dependencies, and it will also install python-numpy as a dependency if you don't already have it installed.

Answer 2

Have your tried to use pip?

sudo pip install numpy

If you dont have pip install pip with instructions here

Answer 3

I have very good experience with the anaconda package manager (learning took me 1-2h). In my opinion it is easier to use than venv and more felixble than pip/env alone. After download and setup you have most of the package like numpy ready to go. So no problems like this anymore!

Answer 4

numpy.show_config() revealed that I had no BLAS support even though python3-scipy was already installed. Uninstalling and re-installing python3-scipy and python3-numpy fixed it:

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

Now I 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