[IronPython] strange runtime error hosting Iron Python in C# app

Matthew Swank matt at wecollectmore.com
Tue Apr 3 16:27:29 CEST 2007


 

 

  _____  

From: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] On Behalf Of Dino Viehland
Sent: Monday, April 02, 2007 5:37 PM
To: Discussion of IronPython
Subject: Re: [IronPython] strange runtime error hosting Iron Python in C#
app

 

How exactly are you doing this?  

.

 

I have a C# app that embeds python to run scripts.  

 

Given a script both the script and the app need to access the same library.
Both the script and the app create objects using the library.  The app links
to the shared library.  In addition, each hosted script has a preamble to
add a reference to, and imports namespaces from the shared library.  

 

Matt

From: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] On Behalf Of Matthew Swank
Sent: Monday, April 02, 2007 3:03 PM
To: users at lists.ironpython.com
Subject: [IronPython] strange runtime error hosting Iron Python in C# app

 

Given a set of classes in a c# Library like the following:

 

    public interface IFoo

    {

        int Bar { get;}

    }

 

    public abstract class FooBase : IFoo

    {

        public abstract int Bar { get;}

    }

 

    public class FooConcrete1 : FooBase

    {

        public override int Bar { get { return 1; } }

    }

 

and a C# consumer:

       public class FooUser

    {

        public static int FooInt(IFoo a)

        {

            return a.Bar;

        }

    }

 

if I call FooInt from Python I'll get: "We Encountered an error: expected
IFoo, got FooConcrete1".

 

I suspect the error stems from adding an assembly as a reference inside the
python code in addition to referencing it in the C# project.  If this is the
case, how do I make referenced assemblies visible to the hosted python
module w/o using AddReference.?

 

Thanks,

 

Matt

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