Here an issue i\'m having on a conda Virtual env. I\'m using ubuntu 64b guest on windows 7 host with Virtual Box.
So when i\'m doing :
source activat
Realize this is a very old question but the same thing just happened to me after doing a conda update conda on my base environment on OSX and the package was numpy. Showed in conda list but could not be imported. What I did, which fixed it:
conda activate base
conda remove numpy
conda install numpy
This fixed things.