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Subject: PythonDotNet Digest, Vol 147, Issue 18
From: pythondotnet-request@python.org
Date: 10/21/16 10:00 am
To: pythondotnet@python.org

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Today's Topics:

1. Support for CLR4 .NET Remoting (pythondotnet)
2. Re: Support for CLR4 .NET Remoting (Denis Akhiyarov)


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Message: 1
Date: Thu, 20 Oct 2016 10:38:28 -0700
From: "pythondotnet" <PythonDotNet@jnpcarole.com>
To: pythondotnet@python.org
Subject: [Python.NET] Support for CLR4 .NET Remoting
Message-ID:
<20161020103828.3e63f68611bc0deecd5a6dd5fef89a2f.fe160eb814.mailapi@email09.godaddy.com>

Content-Type: text/plain; charset="utf-8"

Does pythonnet-2.1.0 support .NET Remoting? When I try to get an interface, python 2.7 crashes:

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object.
at Python.Runtime.ClassDerivedObject.ToPython(IPythonDerivedType obj)
at Python.Runtime.Converter.ToPython(Object value, Type type)
at Python.Runtime.MethodBinder.Invoke(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
at Python.Runtime.MethodObject.Invoke(IntPtr target, IntPtr args, IntPtr kw,MethodBase info)
at Python.Runtime.MethodBinding.tp_call(IntPtr ob, IntPtr args, IntPtr kw)

It's getting past these lines in my script:
import clr
clr.Addreference(my remoting DLL)
from MyNamespace import *

and choking on a static method in my app's remoting DLL call which returns the interface. Through logging, I can tell that the code in that static method call is successfully executing:
(IMyInterface)Activator.GetObject(typeof(IMyInterface), url);
and returning the object back to Python.

This worked fine before when my app targeted .NET 3.5 and I used the CLR2 version of the Python for .NET package. Now my app targets .NET 4.5.2 so I:
- Updated to Python 2.7.12
- Updated the copy of my app's remoting DLL in c:\python27\dll
- Removed the old Python for .NET package
- Executed "pip install pythonnet", which gave me version 2.1.0.

In C:\Python27\Lib\site-packages\ I see:
clr.pyd
Python.Runtime.dll v 2.0.0.2
Python.Runtime.dll.config
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Message: 2
Date: Thu, 20 Oct 2016 13:01:48 -0500
From: Denis Akhiyarov <denis.akhiyarov@gmail.com>
To: "A list for users and developers of Python for .NET"
<pythondotnet@python.org>
Subject: Re: [Python.NET] Support for CLR4 .NET Remoting
Message-ID:
<CALxxJLQFqkMxSs4FvekYcJMNYikPuWZB3W1u+AW4LCSROyOvBA@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Can you provide minimal reproducible code sample for both C# and Python?
What is the latest pythonnet version in which this works?

Are you testing this from interactive python or ipython? There are some
differences between the 2 options.

Please also open an issue on github.

BTW, why have you not switched to WCF?

Thanks,
Denis
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