Numpy build fails with cannot import multiarray

Question

I'm using homebrew python on Mavericks, trying to build numpy 1.8. Unfortunately, when I try to install numpy, I get the following error: https://gist.github.com/ngoldbaum/8592039

I'm able to build numpy 1.7.2 with pip install numpy==1.7.2, but numpy 1.8 always fails to build with the same traceback.

Maybe it's conflict with your system environment. Try to install numpy in the [virtualenv](http://www.virtualenv.org/en/latest/) — waitingkuo, Jan 24 '14 at 04:31
It seems I'm able to build numpy in a virtualenv. Any idea how I can track down what's causing the conflict in my system environment? — ngoldbaum, Jan 24 '14 at 05:00

score 37 · Accepted Answer · answered Jan 21 '16 at 16:56

37

on Mac:

1.) remove these 2 folders manually:

rm -rf /usr/local/lib/python2.7/site-packages/numpy/
rm -rf /usr/local/lib/python2.7/site-packages/numpy-1.10.4.dist-info/

notice: pip uninstall numpy didn't work for me, I had to remove numpy manually.

2.) re-install numpy: pip install numpy

answered Jan 21 '16 at 16:56

Brian

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Work for windows too. Nice solution! – Yonatan Simson Mar 25 '16 at 12:54
I tried this solution but I'm still getting the same error. I'm using Anaconda with python 2.7 and numpy 1.14.0 – Enrique Avina Jan 25 '18 at 04:58
on windows, after doing the the above, don't forget to restart spyder – Sujay DSa May 04 '18 at 12:25
Mine was fine with just `brew uninstall` and `brew install`, so I guess everyone's milage may vary – Matt Fletcher Dec 03 '18 at 13:44
Worked for me too (in a Windows 10 environment). For what it's worth, I installed numpy using `python -m pip install numpy` – PDF417 Jan 18 '19 at 12:02

score 3 · Answer 2 · answered Jan 24 '14 at 05:12

3

This was solved by doing brew uninstall python, deleting the contents of /usr/local/lib/python2.7/site-packages, reinstalling python, and then rebuilding numpy.

answered Jan 24 '14 at 05:12

ngoldbaum

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A more fine-grained solution is to look for previous numpy installations (e.g. look for 'numpy/__init__.py' or multiarray.*) and remove them. – pv. Jan 24 '14 at 10:50

score 0 · Answer 3 · answered Jan 05 '19 at 03:09

0

I solved my issue doing this: Python.exe .\lib\site-packages\easy_install.py

answered Jan 05 '19 at 03:09

Jose Solis Jr.

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score 0 · Answer 4 · answered Mar 12 '19 at 06:23

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I solved it by uninstalling numpy and reinstalling numpy using pip -

pip3 uninstall numpy

pip3 install numpy

answered Mar 12 '19 at 06:23

vikash singh

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Numpy build fails with cannot import multiarray

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