I am interested in whether Python for .NET can help me provide
third-party programmers with a way to write C# routines that will get
called from my Python application. I was impressed earlier today with
how easily Python for .NET compiled for Python 2.6 and the most recent
Visual Studio release, so I set about trying to write a C# routine and
call it from inside of Python.
I have only gotten as far as trying to AddReference() my new DLL, but
have not been able to get it to succeed.
I first created a "Brandon.cs" file with this inside:
----------------------------------------
using System;
using System.Reflection;
[assembly:AssemblyVersion("1.0.0.0")]
[assembly:AssemblyDescription("The Brandon library")]
[assembly:AssemblyCompany("Rhodes Mill Studios, Inc.")]
namespace Brandon
{
public static class BrandonClass
{
public static void Go()
{
Console.WriteLine("Hello, World!");
}
}
}
----------------------------------------
This was simple enough to compile with:
csc /t:library Brandon.cs
which produced a "Brandon.dll" file. Look at what happens if I then try
importing that DLL from Python for .NET:
>>> import clr
>>> print clr.FindAssembly('Brandon')
C:\Users\brandon\dev\pythonnet\Brandon.dll
>>> clr.AddReference('Brandon')
...
System.IO.FileNotFoundException: Unable to find assembly 'Brandon'.
at Python.Runtime.CLRModule.AddReference(String name) in c:\Users\brandon\dev\pythonnet\src\runtime\moduleobject.cs:line 370
You can see that, oddly enough, Python can find the assembly, but cannot
create a reference to it. This error message also results, by the way,
if I compile "Brandon.cs" with a "/keyfile:..." option and run "gacutil
/i Brandon.dll" before trying to run my Python code.
I know that the step I am missing is probably blazingly obvious to those
who have been using Windows longer, :-) but I will very much appreciate
whomever who can point out what critical step I am missing in getting my
Python code to call C# code. Other than this hangup, I'm impressed by
how quickly Python for .NET got me up and running!
--
Brandon Craig Rhodes brandon(a)rhodesmill.org http://rhodesmill.org/brandon
