Hi Martin - Interface types, as they appear to Python, all have a single argument constructor that you can use to "cast" an object to a particular interface. Because System.Activator.GetObject() has a return type of object, the runtime returns the object as its true runtime type to Python (which happens to be MarshalByRefObject). So I think all you need to do is an "explicit cast": remoteObj = System.Activator.GetObject(IToy, url) mytoy = IToy(remoteObj) mytoy.someMethod(...) Hope this helps, Brian Lloyd brian@zope.com V.P. Engineering 540.361.1716 Zope Corporation http://www.zope.com

-----Original Message----- From: pythondotnet-bounces+brian=zope.com@python.org [mailto:pythondotnet-bounces+brian=zope.com@python.org]On Behalf Of Martin Richard Sent: Tuesday, December 28, 2004 3:57 PM To: pythondotnet@python.org Subject: [Python.NET] AttributeError: 'MarshalByRefObject' object has noattribute ...

This is python 2.3.

I start a toy .NET service. This is a C-sharp executable.

In the C-sharp files, this code exists:

namespace foo { public class Toy : MarshalByRefObject, IToy ... }

In python, after loading an assembly, I can successfully do either: from CLR.foo import Toy from CLR.foo import IToy

I can get a string for the url of the service from the config file.

I then try: # using Toy also gives the same result remoteObj = System.Activator.GetObject(IToy, url)

and it returns this for remoteObj: <CLR.System.MarshalByRefObject object at 0x0090D090>

If I try to invoke a method on remoteObj, I get this error: AttributeError: 'MarshalByRefObject' object has no attribute 'methodName'.

It is almost as if the remoteObj has not been cast to the correct type (Itoy). But if I do remoteObj.ToString() it returns 'foo.Toy'.

If I just try to instantiate a local instance of Toy -- t = Toy() -- this succeeds, and I can successfully invoke the method that fails on the remoteObj.

Any ideas why the remoteObj is failing?

Thanks,

Rick

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