How to install Numpy without compiling the sources

Question

I have a project running on CentOS7 that uses Numpy. The problem is that it takes a very huge amount of time to install this dependency.

I therefore tried to yum install numpy libs before pip install it.

So I run:

yum install numpy-1.7.1
pip install numpy==1.7.1   # This pip is executed in a virtualenv

The yum install installs the packaged library, and is quite fast to be performed. The weird thing is that the pip install command re-compile all the sources. This is strange because, from my understanding, the pip install shall only add the python bindings on the compiled lib previously installed.

Any idea to get this library installed without to have everything recompiled?

To be clear, after using the package manager to install numpy to the system (yum install numpy) you can't import numpy in a python shell? To my understanding, the second step, pip install should be unnecessary. Have you tried starting the python interpreter in importing numpy? — Alex
– Alex, Commented Aug 31, 2016 at 14:43
Indeed the yum install install the package globally. But I need to install it into a virtual env, that's why I run the pip install — matt
– matt, Commented Aug 31, 2016 at 16:10

matt · Accepted Answer · 2016-09-01 07:05:08Z

1

I solved it by symlinking the 'global lib' (installed by yum install) into the virtual env:

ln -s /lib64/python2.7/site-packages/numpy $VENV/lib64/python2.7/site-packages/numpy
ln -s /lib64/python2.7/site-packages/numpy-1.7.1-py2.7.egg-info $ENV/lib64/python2.7/site-packages/numpy-1.7.1-py2.7.egg-info

answered Sep 1, 2016 at 7:05

matt

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