Hi everyone,
I just started using GRASS GIS and I would like to use the v.class.mlpy extension. So I successfully installed numpy, scipy and mlpy and when I import them in Python they all seem to work fine. However, when I try to install the v.class.mlpy extension using "g.extension extension=v.class.mlpy" I get the following error message:
"Cannot import mlpy (http://mlpy.sourceforge.net) library. Please install it or ensure that it is on path. (use PYTHONPATH variable)."
The mlpy folder (/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/) is on my PYTHONPATH and if I start Python in the terminal and import mlpy everything works fine.
If I try to directly import mlpy in the GRASS GIS Python shell I get the following message:
Python 2.7.8 (v2.7.8:ee879c0ffa11, Jun 29 2014, 21:07:35)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
import mlpy
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/__init__.py", line 18, in <module>
import gsl
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/gsl.so, 2): Symbol not found: _gsl_sf_fact
Referenced from: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/gsl.so
Expected in: flat namespace
in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/gsl.so
Does anybody know what might be the problem? I would greatly appreciate any help!! 
Cheers,
Christina
On Thu, Aug 28, 2014 at 3:08 AM, Christina Ludwig <christina_ludwig@gmx.net>
wrote:
Hi everyone,
I just started using GRASS GIS and I would like to use the v.class.mlpy
extension. So I successfully installed numpy, scipy and mlpy and when I
import them in Python they all seem to work fine. However, when I try to
install the v.class.mlpy extension using "g.extension
extension=v.class.mlpy" I get the following error message:
"Cannot import mlpy (http://mlpy.sourceforge.net) library. Please install
it or ensure that it is on path. (use PYTHONPATH variable)."
The mlpy folder
(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/)
is on my PYTHONPATH and if I start Python in the terminal and import mlpy
everything works fine.
If I try to directly import mlpy in the GRASS GIS Python shell I get the
following message:
Python 2.7.8 (v2.7.8:ee879c0ffa11, Jun 29 2014, 21:07:35)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
import mlpy
Traceback (most recent call last):
File "<input>", line 1, in <module>
File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/__init__.py",
line 18, in <module>
import gsl
ImportError:
dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/gsl.so,
2): Symbol not found: _gsl_sf_fact
Referenced from:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/gsl.so
Expected in: flat namespace
in
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mlpy/gsl.so
Does anybody know what might be the problem? I would greatly appreciate
any help!!
I don't know where is the problem. It seems that Python environment is
somehow broken in GRASS session. This might be due to the different ways
how software is installed on Mac.
To understand the problem more, you can try to run python from standard
command line but in GRASS GIS session (i.e. not from the GUI). You can also
check PYTHONPATH environmental variable there. Compare also values of
DYLD_LIBRARY_PATH environmental variable. Also Python variable
sys.executable might be interesting.
Note that there is also v.class.ml module which has richer but different
functionality and can use also scikit-learn library.
http://svn.osgeo.org/grass/grass-addons/grass7/vector/v.class.ml/v.class.ml.html
http://scikit-learn.org/stable/
Vaclav
Cheers,
Christina
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