ImportError: numpy.core.multiarray failed to import

Question

I was getting the same error and was able to solve it by updating my numpy installation to 1.8.0:

pip install -U numpy

In the case that

pip install -U numpy 

doesn't work (even with sudo), you may want to make sure you're using the right version of numpy. I had the same "numpy.core.multiarray failed to import" issue, but it was because I had 1.6 installed for the version of Python I was using, even though I kept installing 1.8 and assumed it was installing in the right directory.

I found the bad numpy version by using the following command in my Mac terminal:

python -c "import numpy;print(numpy.__version__);print(numpy.__file__)";

This command gave me the version and location of numpy that I was using (turned out it was 1.6.2). I went to this location and manually replaced it with the numpy folder for 1.8, which resolved my "numpy.core.multiarray failed to import" issue. Hopefully someone finds this useful!

Note: For the command, use double underscore before and after 'version' and 'file'

If you want a specific version:

pip install numpy==1.8

If you are using python3, the following command fixes the problem in macos.

python3 -m pip install numpy -I

Try sudo pip install numpy --upgrade --ignore-installed.

It work in Mac OS 10.11.

You should close The 'Rootless' if above shell isn't work.

pip install opencv-python==3.4.2.17 numpy==1.14.5

done the job for me!