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a scipy installation problem?

Hi. I need to use SciPy (a library of scientific tools for python) but
I runned upon a problem after installing it. I downloaded the binaries
from scipy.org and copied the contents of the archive in the
/usr/lib/python2.2/site-packages/ (there I have a number of other
modules and the "/usr/lib/python2.2/site-packages" is in the
sys.path). What I use are: Python 2.2.1 on linux2 and
SciPy-0.2.0_alpha_200 .4161.linux2_py .tar.gz
Then, this is what I get...
from scipy import * Segmentation fault (core dumped)

Everything seems to be ok when I import a different module (for
plotting) that comes together with scipy (simply, it is another folder
isnide of the same folder /usr/lib/python2.2/site-packages/chaco):
from chaco import *


This is probably something simple, but I just start to use python and
have no experience in programming, so I can not figure out where the
problem is.
Does anyone know what's needed to do so as to make it working?
Thanks in advance.
Regards

avik
Jul 18 '05 #1
3 1905
avik <av*****@netsca pe.net> wrote:
Hi. I need to use SciPy (a library of scientific tools for python) but
I runned upon a problem after installing it. I downloaded the binaries
from scipy.org and copied the contents of the archive in the
/usr/lib/python2.2/site-packages/ (there I have a number of other
modules and the "/usr/lib/python2.2/site-packages" is in the
sys.path). What I use are: Python 2.2.1 on linux2 and
SciPy-0.2.0_alpha_200 .4161.linux2_py .tar.gz
Then, this is what I get...
from scipy import * Segmentation fault (core dumped)

Everything seems to be ok when I import a different module (for
plotting) that comes together with scipy (simply, it is another folder
isnide of the same folder /usr/lib/python2.2/site-packages/chaco):
from chaco import *


This is probably something simple, but I just start to use python and
have no experience in programming, so I can not figure out where the
problem is.
Does anyone know what's needed to do so as to make it working?
Thanks in advance.
Regards


What happens if you do "import scipy" instead of "from scipy import *"?

"from ... import *" is _almost_ always a bad idea anyway, since it
clutters up your namespace. It also causes issues with the reload()
function. Avoid that usage unless you *really* know what you're doing.

--
Robin Munn
rm***@pobox.com
Jul 18 '05 #2
Robin Munn <rm***@pobox.co m> wrote in message
What happens if you do "import scipy" instead of "from scipy import *"?

"from ... import *" is _almost_ always a bad idea anyway, since it
clutters up your namespace. It also causes issues with the reload()
function. Avoid that usage unless you *really* know what you're doing.


Actually, up to now (during a short time, anyway) I have always used
"import <module>" without having any special reason to avoid "from
<module> import *" :-).
In the case of scipy I just tried out the first thing that's written
in its short tutorial and

the same is with that:
import scipy

Segmentation fault (core dumped)

Regards

avik
Jul 18 '05 #3
avik <av*****@netsca pe.net> wrote:
Robin Munn <rm***@pobox.co m> wrote in message
What happens if you do "import scipy" instead of "from scipy import *"?

"from ... import *" is _almost_ always a bad idea anyway, since it
clutters up your namespace. It also causes issues with the reload()
function. Avoid that usage unless you *really* know what you're doing.


Actually, up to now (during a short time, anyway) I have always used
"import <module>" without having any special reason to avoid "from
<module> import *" :-).
In the case of scipy I just tried out the first thing that's written
in its short tutorial and

the same is with that:
import scipy

Segmentation fault (core dumped)

Regards


OK, so "from ... import *" isn't the culprit.

I see in your original post that you downloaded the binaries and copied
them into your site-packages. It may be that the binaries you downloaded
were linked against a library version you don't have. Try downloading a
source archive and doing "python setup.py install" to install it. I'm
guessing that will fix the segfault problem.

--
Robin Munn
rm***@pobox.com
Jul 18 '05 #4

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