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জুন 2010

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how can I build an assembly I can AddReference()?
by Brandon Craig Rhodes 17 আগস্ট, 2010

17 আগস্ট, 2010

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

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