This is some of the best info distributed to date concerning compiling pythondotnet for .NET 4 On 5/3/2011 1:04 AM, SourceForge.net wrote:

Bugs item #3293169, was opened at 2011-04-26 08:30 Message generated for change (Comment added) made by barton_c You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=823891&aid=3293169&group_id=162464

Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Interface (example) Group: None Status: Closed Resolution: None Priority: 5 Private: No Submitted By: Guillaume (gdumont) Assigned to: Nobody/Anonymous (nobody) Summary: clr.AddReference fails when assembly is built with .NET 4.0

Initial Comment: Hi,

I am not sure if it is a bug or an incompatibility between the CLR versions but here it is:

I can successfully load an assembly built with version 2.0, 3.0 and 3.5 but it fails to load with 4.0. I always get a file not found exception

File "<stdin>", line 1, in<module> System.IO.FileNotFoundException: Unable to find assembly 'MyPythonAssemby'. at Python.Runtime.CLRModule.AddReference(String name) in H:\Documents\Visual Studio 2008\Projects\PySharp\trunk\pythonnet\src\runtime\moduleobject.cs:line 375

Does python for .NET support .NET 4.0?

Thanks

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Comment By: Barton Cline (barton_c) Date: 2011-05-03 01:04

Message:

Here is how oleksii got VS2010 and .NET 4.0 working:

1. Get the sources (tarball from sourceforge or directly from SVN) 2. Open the pythonnet.sln with VS2010 and convert to 2010 format (will happen automagically) 3. Change the target framework to 4. Follow the following step for EACH project 3.1. Right-click on the project name and select "Properties" 3.2. Select the "Application" tab on the left (if not selected yet) 3.3. Change the "Target framework" to ".NET Framework 4" 4. Open the clrmodule.il and change the lines with the version number in the following piece of code

.assembly extern mscorlib { .publickeytoken = (B7 7A 5C 56 19 34 E0 89 ) .ver 2:0:0:0 }

to have

.ver 4:0:0:0

5. Open the buildclrmodule.bat and change the

%windir%\Microsoft.NET\Framework\v2.0.50727\ilasm /nologo /quiet /dll %ILASM_EXTRA_ARGS% /include=%INCLUDE_PATH% /output=%OUTPUT_PATH% %INPUT_PATH%

to

%windir%\Microsoft.NET\Framework\v4.0.30319\ilasm /nologo /quiet /dll %ILASM_EXTRA_ARGS% /include=%INCLUDE_PATH% /output=%OUTPUT_PATH% %INPUT_PATH%

5. Recompile the whole solution, ignore the deprecation warnings.

Now you have all necessary files under the pythonnet folder where you have the sources. You need clr.pyd, python.exe and Python.Runtime.dll.

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Comment By: Guillaume (gdumont) Date: 2011-04-26 11:02

Message: Ok,

After recompiling with vs2010 and targeting .NET 4.0 my assembly loads fine. So I closed the ticket.

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You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=823891&aid=3293169&group_id=162464