[Jython-users] Syntax errors

[David B. <dav...@go...>]

Hi there,
I am new to using jython and im having trouble with the basics.
I have tried to embed simple python programs in java, as in some tutorials
on jython have shown but im constantly getting syntax errors.

If i try something like this,

import org.python.core.PyException;
import org.python.core.PyInteger;
import org.python.core.PyObject;
import org.python.util.PythonInterpreter;

public class SimpleEmbedded {

   public static void main(String[] args) throws PyException {
        PythonInterpreter interp = new PythonInterpreter();
        interp.exec("import sys");
        interp.exec("print sys");
        interp.set("a", new PyInteger(42));
        interp.exec("print a");
        interp.exec("x = 2+2");
        PyObject x = interp.get("x");
        System.out.println("x: " + x);
    }
}



I get an error,

Traceback (innermost last):
 (no code object) at line 0
File "simpleEmbed.java", line 6
     public class Simple Embedded {
               ^

SyntaxError: invalid syntax

Next trying something like this,

import org.python.util.PythonInterpreter;
import org.python.core.*;

class TestPythonTwo {
   public static void main ( String[] args ) {
      try {
         org.python.util.PythonInterpreter python = new
org.python.util.PythonInterpreter();
         python.exec ( "import math" );
         python.exec ( "print 'Hello Jython World!'" );
         python.exec ( "print math.pi" );
         python.exec ( "print math.e" );
         python.exec ( "print math.sqrt ( 25 )" );
      } catch ( Exception e ) {
         System.out.println ( "An error was encountered." );
      }
   }
}

gives an error,

Traceback (innermost last):
 (no code object) at line 0
File "embedTestPython.java", line 2
     import org.python.core.*;
                                       ^

SyntaxError: invalid syntax

Same error but its pointing to the * instead of class.
I think this has something to do with the import lines, as if i change the,

import org.python.core.*;

line to,

import org.python.core.__builtin__;

it will give an error pointing to the first curly bracket { in the code.

Anyone know what is causing it? Im sure its very simple but Im new to both
java and jython as of a few weeks ago and really struggling with this.

Many thanks for any help.