How can I upgrade NumPy?

Question

When I installed OpenCV using Homebrew (brew), I got this problem whenever I run this command to test python -c \"import cv2\":

Run         


        

Answer 1

Because we have two NumPy installations in the system. One is installed by Homebrew and the second is installed by pip. So in order to solve the problem, we need to delete one and use the default NumPy install by OpenCV.

Check the path,

import numpy
print numpy.__path__

and manually delete it using rm.

Answer 2

I tried doing sudo pip uninstall numpy instead, because the rm didn't work at first.

Hopefully that helps.

Uninstalling then to install it again.

Answer 3

If you don't encounter any permission errors with

pip install -U numpy

try:

pip install --user -U numpy

Answer 4

When you already have an older version of NumPy, use this:

pip install numpy --upgrade

If it still doesn't work, try:

pip install numpy --upgrade --ignore-installed

Answer 5

If you are stuck with a machine where you don't have root access, then it is better to deal with a custom Python installation.

The Anaconda installation worked like a charm:

• Installing packages (SciPy.org)
• Anaconda Python/R Distribution - download

After installation,

[bash]$ /xxx/devTools/python/anaconda/bin/pip list --format=columns | grep numpy

numpy 1.13.3 numpydoc 0.7.0

Answer 6

Because you have multiple versions of NumPy installed.

Try pip uninstall numpy and pip list | grep numpy several times, until you see no output from pip list | grep numpy.

Then pip install numpy will get you the newest version of NumPy.