Dear Pierre, as indicated yesterday OSX system python is in: /System/Library/Frameworks/Python.framework/ I am installing into: /Library/Frameworks/Python.framework/Versions/Current/lib/python2.7/site-packages This should not present a problem and does not explain why numpy does not build/import correctly on my setup. regards, Andrew.

Date: Tue, 7 Aug 2012 14:00:58 +0200 From: Pierre GM <pgmdevlist@gmail.com> Subject: Re: [Numpy-discussion] building numpy 1.6.2 on OSX 10.6 / Python2.7.3

Andrew,

I'm afraid you did.

It's generally considered a "very bad idea"(?) to install NumPy on a recent OSX system without specifying a destination. By default, the process will try to install on /Library/Frameworks/Python, overwriting the pre-installed version of NumPy that comes with your machine. You probably don't want to do that.

However, using either the --user flag or a virtual environment ( http://www.virtualenv.org/ <http://www.virtualenv.org/en/latest/>) works pretty well. EG

`python setup.py install --user` should install bumpy in a ~/.local directory, you'll just have to update your PYTHONPATH

Good luck

--

Pierre GM

On Tuesday, August 7, 2012 at 08:15 , Andrew Nelson wrote:

Dear list,

I am trying to build numpy 1.6.2 from source but am running up against a few problems.

Platform: OSX10.6.8

Python: 2.7.3 (compiled using gcc 4.2.1)

gcc: 4.2.1

gfortran: 4.2.1

I try the normal build sequence:

python setup.py build

sudo python setup.py install

However, when I try to import numpy I get:

...

...

...

import numpy

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File

"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/__init__.py", line 137, in <module>

import add_newdocs

File

"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/add_newdocs.py", line 9, in <module>

from numpy.lib import add_newdoc

File

"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/lib/__init__.py", line 4, in <module>

from type_check import *

File

"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/lib/type_check.py", line 8, in <module>

import numpy.core.numeric as _nx

File

"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/__init__.py", line 5, in <module>

import multiarray

ImportError:

dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/multiarray.so, 2): Symbol not found: _npy_ceil

Referenced from:

/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/multiarray.so

Expected in: flat namespace

in

/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/multiarray.so

The numpy source was from the Sourceforge official page.

When I run nm on the multiarray module I get:

%nm /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/multiarray.so

.......<snip a lot of stuff>

U _npy_ceil

U _npy_double_to_half

U _npy_doublebits_to_halfbits

U _npy_float_to_half

U _npy_floatbits_to_halfbits

U _npy_half_isnan

U _npy_half_iszero

U _npy_half_le

U _npy_half_lt_nonan

U _npy_half_to_double

U _npy_half_to_float

U _npy_halfbits_to_doublebits

U _npy_halfbits_to_floatbits

So it seems that the _npy_ceil symbol is undefined. I looked at /build/src.macosx-10.6-intel-2.7/numpy/core/include/numpy/config.h and it contains:

#define HAVE_CEIL

Am I doing something wrong?

regards,

Andrew

-- _____________________________________ Dr. Andrew Nelson

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