[IronPython] Returning an object from a script

[Barry Carr]

Hi,

Using IP2B3 (on .NET 2,0), is it possible to get a IronPython script to create an object and return 
it or pass it back to the host application to be used later?

I tried what I thought was the obvious route but got a null reference exception when I tried to use 
the returned object (the code is Oxygene - an Object Pascal variant):

class method ConsoleApp.Main;
begin
  PrepPython;

  var script := pe.CreateScriptSourceFromFile( ".\\PythonHostingTest.py" );
  var scope  := env.CreateScope;
  var obj : Object := nil;
  scope.SetVariable("instance", obj );
  script.Execute(scope);
  IMigration(obj).Up;                     // <-- Null ref exception here
  Console.WriteLine('Hello World.');
end;

class method ConsoleApp.PrepPython;
begin
  env := ScriptRuntime.Create;
  env.LoadAssembly( typeOf(String).Assembly );
  env.LoadAssembly( typeOf(Debug).Assembly );
  env.LoadAssembly( typeOf(IMigration).Assembly );
  pe := env.GetEngine("py");
end;

And here is my IronPython Script:

import System
from GeoMEM.NETandCF.Migrations import *

class Hello(IMigration):
    def __init__( self, msg = "A BIIIG Hello From Python" ):
        self.msg = msg

    def Up(self):
        print self.msg

    def Down(self):
        print "Down"


instance = Hello()

Am I close or barking up the wrong tree? Thanks.

Cheers
Barry Carr
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