Python numpy update from 1.6 to 1.8

Question

I have installed numpy 1.8. But when I do print numpy.__version__ it says 1.6.

What do I have to change to get python to realize where numpy is? Working on a Mac (10.9). I'm using python 2.7.6.

Edit:

I've tried to delete all my versions of numpy. I did pip uninstall numpy. And then I typed:

python import numpy print numpy.version

and it printed out 1.6.2

I can't delete numpy apparently.

Answer 1

I am running Python 2.7.5 on Mac OS X 10.9.4, and this appears to be some kind of weird bug in how the Macintosh factory-installed version of Python is handling upgraded package installations.

In my case, when I do:

sudo pip uninstall numpy

it removes the version of numpy installed under

/Library/Python/2.7/site-packages

However, this does not mean that numpy is fully removed from the system! There are a second set of "backup" versions of several Python packages installed also at:

/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python

When I install numpy using the /usr/bin/easy_install utility that Apple shipped with the OS X system, the latest version (currently at 1.9.0, as of this posting) of numpy is loaded into Library/Python/2.7/site-packages, just as one would expect, and it correctly precedes the "OS X system default" version of numpy in the module load path so that the latest version of numpy is loaded when I do import numpy in Python. However--and this is the really weird, apparently buggy behavior!--when I uninstall numpy, and instead reinstall using either pip, or by doing:

sudo python setup.py install

on a .tar.gz distribution downloaded directly from sourceforge, the upgraded installation does not appear to take precedence in the Python module load path, even though it is also installed under /Library/Python/2.7/site-packages!

Anyway, to fix the problem (or rather, I should probably say, to work around the bug, at least on Max OS X), follow this procedure:

1. Uninstall the numpy package from /Library/Python/2.7/site-packages using the method of your choice (pip uninstall numpy appeared to work for me)
2. Verify that there is indeed no longer any numpy package still remaining under /Library/Python/2.7/site-packages
3. Reinstall numpy using the factory-included /usr/bin/easy_install. Do not use any other alternative method, at least not if you want to use numpy with the Apple factory-installed version of Python 2.7

Alternatively, using a completely different distribution of Python (e.g., Canopy or Anaconda), as one of the other commenters already mentioned, should also work as well.