Re: Exception during numpy import

Thanks Stefan. I will go through JyNI and the links to others that you provided.

Thanks,
Pradeep V.B.

From: Stefan Richthofer [mailto:[email protected]]
Sent: Thursday, January 29, 2015 11:00 AM
To: Pradeep Badiger
Cc: [email protected]
Subject: Aw: [Jython-dev] Exception during numpy import

Hello Pradeep,

unfortunately Numpy is not supported by Jython, as it is a native C-extenstion for CPython, which are not compatible with Jython in general.
However using JyNI (www.jyni.org<http://www.jyni.org>) one can at least use basic C-extensions with Jython, currently linux-only. I hope to get it working with Numpy
within half a year or so (but actually estimated this time frame one year ago^^).
Until then your best bet would be Numpy4J (https://github.com/JosephCottam/Numpy4J) which accesses NumPy from java by embedding the CPython
interpreter. It does not integrate with Jython, but you can write a java class wrappering the numpy-functions you need and then acces this class from
Jython.

These Non-Numpy-specific general aproaches to embed CPython in Java are also worth a look:

JPY:
http://jpy.readthedocs.org/en/latest/intro.html

Jepp/Jep:
http://jepp.sourceforge.net
https://github.com/mrj0/jep

- Stefan


Gesendet: Donnerstag, 29. Januar 2015 um 16:35 Uhr
Von: "Pradeep Badiger" <[email protected]<mailto:[email protected]>>
An: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>
Betreff: [Jython-dev] Exception during numpy import
Hi,

I am trying to import numpy (1.9.1 for python 2.7) package in a jython script and this script is executed using jython-standalone (v 2.7-b1) APIs.

I have set the path to numpy by setting the properties in PythonInterpreter

Properties props = new Properties();
props.setProperty("python.path", "C:\\Python27\\Lib\\site-packages");
PythonInterpreter.initialize(System.getProperties(), props, new String[] {""});


I am getting following exception while evaluating the script.

javax.script.ScriptException: SyntaxError: 'import *' not allowed with 'from .' in C:\Python27\Lib\site-packages\numpy\__init__.py at line number 182 at column number 4
       at org.python.jsr223.PyScriptEngine.scriptException(PyScriptEngine.java:190)
       at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:42)
       at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:31)
       at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
       at com.fico.dmip.scriptjs.PythonScriptExecutor.<init>(PythonScriptExample.java:68)
       at com.fico.dmip.scriptjs.PythonScriptExample.main(PythonScriptExample.java:50)

Also I tried with jython-standalone-2.7.b3 and it gave me a different exception.

console: Failed to install '': java.nio.charset.UnsupportedCharsetException: cp0.
javax.script.ScriptException: ImportError: No module named type_check in <script> at line number 3
       at org.python.jsr223.PyScriptEngine.scriptException(PyScriptEngine.java:202)
       at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:42)
       at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:31)
       at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
       at com.fico.dmip.scriptjs.PythonScriptExecutor.<init>(PythonScriptExample.java:68)
       at com.fico.dmip.scriptjs.PythonScriptExample.main(PythonScriptExample.java:50)

Can someone help me on which version of numpy is supported with the release of jython?

Thanks,
Pradeep V.B.


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