Hi guys, I am using MacOS 10.9.4 with Xcode 5.1 (command line tools installed)
Today I upgraded macports and installed py27-numpy. Everything looked ok in my terminal window.
Then I tried to install PyCogent but failed due to 'Runtime error: Numpy required but not found'.
I kept trying , using pip. And it showed:
Requirement already satisfied (use --upgrade to upgrade): numpy in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python
Cleaning up...
Now I am confused. Did I install numpy or not? Do I need to source the environmental variables after macports install?
Any idea would be welcome.
Cheers!
Did you use the correct pip to install numpy? I think MacOS comes with its own Python installation, with its own site-packages directory. MacPorts installs into /opt/local, /System/Library/Frameworks looks like the pre-installed Python ... The right pip should be in /opt/local/bin.
Another possibility is that PyCogent uses #! /usr/env python or something similar and then picks the wrong python binary without numpy.
Setting PYTHONPATH should be a lost resort option.
Check out this: http://superuser.com/questions/35256
python_select should be able to solve your problem.
I have not used Python on Mac OS, but can I suggest you try installing Anaconda Python distribution for Mac OS? Their distribution comes with a large number of scientific Python modules, has a package manager named conda that is better and co-exists with pip. You can create virtual Python environments more easily than virtualenv and segregate your Python environment from the one already installed on your OS. Google Anaconda Python or Continuum Analytics. URL below must work.
https://store.continuum.io/cshop/anaconda
@Matthias thx for your suggestion. Now it seems I find the problem,after typing
port select --list python
it shows:
Available versions for python:
none (active)
python25-apple
python26-apple
python27
python27-apple
The currently selected version for 'python' is 'none'
How can I activate the python27? I feel it's odd coz I can still run python scripts.
All those tools create symbolic links to the Python you want, if you never used the tools it is set to the system default one provided by Apple. You should run
sudo port select --set python python27
to select the py27 version. In general I would advise to use pip to install Python packages, MacPorts creates a bit of a mess, especially if you want to use Python3 as well or use it for a longer time und update across versions. Also, I recently switched to homebrew, it is much better than MacPorts or Fink in my opinion.
@Fang, I updated the URL in my post above. It is here again for your reference. Hope it solves your problem.
https://store.continuum.io/cshop/anaconda
a very easy way (but much larger disk space required) would be installing "enthought canopy", comes with a useful package manager (as well as many other things).
FWIW, I've had much better success with installing pip, numpy etc using the Homebrew package manager.
http://brew.sh/
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