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":

RuntimeError: module compiled against API version 9 but this version of numpy is 6 Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: numpy.core.multiarray failed to import

I tried to upgrade NumPy, but this is confusing:

>>> import numpy >>> print numpy.__version__ 1.6.1

When I run brew to upgrade NumPy, I got this problem:

brew install -u numpy Warning: numpy-1.9.1 already installed

When I uninstalled it:

sudo pip install numpy Requirement already satisfied (use --upgrade to upgrade): numpy in ./anaconda/lib/python2.7/site-packages

I have followed this question and deleted Anaconda from my mac.

pip install numpy Requirement already satisfied (use --upgrade to upgrade): numpy in /Library/Python/2.7/site-packages

But nothing have changed. How can I link the NumPy version to OpenCV?

Peter Mortensen · Accepted Answer · 2019-06-16 11:32:42Z

84

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

edited Jun 16, 2019 at 11:32

Peter Mortensen

31.4k22 gold badges110 silver badges134 bronze badges

answered Feb 28, 2018 at 0:54

Rebecca

8516 silver badges4 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Peter Mortensen · Accepted Answer · 2019-06-16 11:21:58Z

44

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.

edited Jun 16, 2019 at 11:21

Peter Mortensen

31.4k22 gold badges110 silver badges134 bronze badges

answered Feb 14, 2015 at 17:17

user3378649

5,35416 gold badges55 silver badges77 bronze badges

3 Comments

Jonan Gueorguiev Over a year ago

It doesn't seem to be working for Mac OSX El Capitan, because (a) it refuses to delete the numpy's folder which is in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python, and (b) this is generally not a good approach,

aasu Over a year ago

@ИванГеоргиев: How else, then?

Vorac Over a year ago

Thank you so much, this solved an issue with conflicting versions that I had put far too much time into. Debian python and pip seem to live in /usr/lib, \usr/local/lib and ~/.local/lib/.

Peter Mortensen · Accepted Answer · 2019-06-16 11:24:38Z

The error you mentioned happens when you have two versions of NumPy on your system. As you mentioned, the version of NumPy you imported is still not upgraded since you tried to upgrade it through pip (it will upgrade the version existing in '/Library/Python/2.7/site-packages' ).

However Python still loads the packages from '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy' where the pre-installed packages live.

In order to upgrade that version you have to use easy_install. The other way around this problem is using virtualenv and setting up a new environment with all the requirements you need.

sudo easy_install numpy searched added the latest numpy path(already existing coz of my sudo pip install numpy). Perfect soln.
Had similar issue. sudo easy_install numpy . It removed previous and updated latest. Traceback Searching for numpy Best match: numpy 1.11.2 Removing numpy 1.8.2 from easy-install.pth file Adding numpy 1.11.2 to easy-install.pth file
This worked for me as well (first installing it using pip --ignore-installed, then "linking" it so python finds it using sudo easy_install numpy). The other solutions didn't work.
sudo easy_install numpy did not work for me, but sudo pip install --ignore-installed numpy did work nicely. Thanks BjornW.

Abdullah Akhtar · Accepted Answer · 2019-07-30 11:17:03Z

Update numpy

For python 2

pip install numpy --upgrade

You would also needed to upgrade your tables as well for updated version of numpy. so,

pip install tables --upgrade

For python 3

pip3 install numpy --upgrade

Similarly, the tables for python3 :-

pip3 install tables --upgrade

note:

You need to check which python version are you using. pip for python 2.7+ or pip3 for python 3+

Peter Mortensen · Accepted Answer · 2019-06-16 11:26:17Z

FYI, when you using or importing TensorFlow, a similar error may occur, like (caused by NumPy):

RuntimeError: module compiled against API version 0xa but this version of numpy is 0x9 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/dist-packages/tensorflow/__init__.py", line 23, in <module> from tensorflow.python import * File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/__init__.py", line 60, in <module> raise ImportError(msg) ImportError: Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/__init__.py", line 49, in <module> from tensorflow.python import pywrap_tensorflow File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/pywrap_tensorflow.py", line 28, in <module> _pywrap_tensorflow = swig_import_helper() File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/pywrap_tensorflow.py", line 24, in swig_import_helper _mod = imp.load_module('_pywrap_tensorflow', fp, pathname, description) ImportError: numpy.core.multiarray failed to import Error importing tensorflow. Unless you are using bazel, you should not try to import tensorflow from its source directory; please exit the tensorflow source tree, and relaunch your python interpreter from there.

I followed Elmira's and Drew's solution, sudo easy_install numpy, and it worked!

sudo easy_install numpy Searching for numpy Best match: numpy 1.11.3 Removing numpy 1.8.2 from easy-install.pth file Adding numpy 1.11.3 to easy-install.pth file Using /usr/local/lib/python2.7/dist-packages Processing dependencies for numpy Finished processing dependencies for numpy

After that I could use TensorFlow without error.

0bserver07 · Accepted Answer · 2015-12-27 04:27:18Z

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.

Peter Mortensen · Accepted Answer · 2019-06-16 11:26:58Z

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.

Peter Mortensen · Accepted Answer · 2019-06-16 11:28:07Z

3

This works for me:

pip install numpy --upgrade

edited Jun 16, 2019 at 11:28

Peter Mortensen

31.4k22 gold badges110 silver badges134 bronze badges

answered Oct 22, 2017 at 12:59

Luna Kong

3,16529 silver badges20 bronze badges

Comments

Peter Mortensen · Accepted Answer · 2019-06-16 11:28:53Z

2

If you don't encounter any permission errors with

pip install -U numpy

try:

pip install --user -U numpy

edited Jun 16, 2019 at 11:28

Peter Mortensen

31.4k22 gold badges110 silver badges134 bronze badges

answered Dec 28, 2017 at 14:22

abaro

211 bronze badge

1 Comment

Jason V Over a year ago

I know this is a couple of years old, but awesome ty

Luo Bo · Accepted Answer · 2017-06-22 08:16:19Z

All the same.

 sudo easy_install numpy

My Traceback

Searching for numpy Best match: numpy 1.13.0 Adding numpy 1.13.0 to easy-install.pth file Using /Library/Python/2.7/site-packages Processing dependencies for numpy

Peter Mortensen · Accepted Answer · 2019-06-16 11:27:43Z

After installing pytorch, I got a similar error when I used:

import torch

Removing NumPy didn't help (I actually renamed NumPy, so I reverted back after it didn't work). The following commands worked for me:

sudo pip install numpy --upgrade sudo easy_install numpy

user163859 · Accepted Answer · 2022-09-30 12:25:19Z

If you are using multiple versions of Python (for example 3.8 and 3.9), then specify explicitly for which one you want to install and update numpy:

python3.8 -m pip install numpy --upgrade # or python3.9 -m pip install numpy --upgrade

Then run your program with the appropriate version of Python.

Peter Mortensen · Accepted Answer · 2019-06-16 11:31:48Z

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

Ben · Accepted Answer · 2022-08-25 06:46:05Z

0

pip install numpy --upgrade

You can try to use the ablove command and use as adminstrator if open CMD.

answered Aug 25, 2022 at 6:46

community wiki

Ben

1 Comment

Christoph Rackwitz Over a year ago

this same answer was already given in other answers, among them the top-voted one

Collectives™ on Stack Overflow

How can I upgrade NumPy?

14 Answers 14

Comments

3 Comments

4 Comments

Update numpy

note:

Comments

Comments

Comments

Comments

Comments

1 Comment

Comments

Comments

Comments

Comments

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

14 Answers 14

Comments

3 Comments

4 Comments

Update numpy

note:

Comments

Comments

Comments

Comments

Comments

1 Comment

Comments

Comments

Comments

Comments

1 Comment

Linked

Related