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Executing a Jython function from Java

Hello,

in the site I found a lot of complicated examples, but I can't find
the simple one I'm looking for.

The problem is:

I have 1 jython file (script1.py) with a function named 'calculate',
and a java file (run.java).

I'd like to call the jython function from the java class recursively.
<<====<<

I think it can be possible to get a PyFunction object that rapresents
the function, and then call the function from the already evaluated
object, so I don't need to re-evaluate it every loop.

My code is something like this:

PythonInterpret er interp = new PythonInterpret er();
interp.execfile ('script1.py');
for (int i = 0; i < 1000; i++) {
interp.eval("ca lculate(8)");
}

Thanks in advance,

Dario
Jul 18 '05 #1
1 14596
da***@fga-software.com (ProgDario) wrote in message news:<67******* *************** ****@posting.go ogle.com>...
Hello,

in the site I found a lot of complicated examples, but I can't find
the simple one I'm looking for.

The problem is:

I have 1 jython file (script1.py) with a function named 'calculate',
and a java file (run.java).

I'd like to call the jython function from the java class recursively.
<<====<<

I think it can be possible to get a PyFunction object that rapresents
the function, and then call the function from the already evaluated
object, so I don't need to re-evaluate it every loop.

My code is something like this:

PythonInterpret er interp = new PythonInterpret er();
interp.execfile ('script1.py');
for (int i = 0; i < 1000; i++) {
interp.eval("ca lculate(8)");
}

Thanks in advance,

Dario


I searched the web for a long time, and finally Jeff Emanuel emailed
me and solved the problem.

That's the code, any advice is apreciated:

import java.io.*;
import java.util.*;
import java.text.*;

import org.python.util .PythonInterpre ter;
import org.python.core .*;

public class Calculate {
public static void main(String[] args){
PythonInterpret er interp = new PythonInterpret er();
interp.execfile ("script1.py ");
PyFunction func =
(PyFunction)int erp.get("calcul ate",PyFunction .class);
SimpleDateForma t sdf = new SimpleDateForma t("dd/MM/yyyy hh.mm.ss");
System.out.prin tln("======[" + sdf.format(new Date()) +
"]===========");
for (int i=1 ; i<10000 ; ++i) {
// Assuming calculate takes a float argument.
func.__call__(n ew PyFloat(i));
//interp.eval("ca lculate(" + i + ")");
}
System.out.prin tln("======[" + sdf.format(new Date()) +
"]===========");
}
}
Jul 18 '05 #2

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