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pythonnet@python.org

June 2015

14 participants
12 discussions

Python for .NET load .dll
by Gianni Iannelli 08 Jun '15

08 Jun '15

Dear All, I have a problem loading an external dll using Python through Python for .NET. I have tried different methodologis following stackoverflow and similar. I will try to summarize the situation and to describe all the steps that I've done.I have a dll named for e.g. Test.NET.dll. I checked with dotPeek and I can see, clicking on it, x64 and .NET Framework v4.5. On my computer I have installed the .Net Framework 4.I have also installed Python for .NET in different ways. I think that the best one is download the .whl from this website http://www.lfd.uci.edu/~gohlke/pythonlibs/#pythonnet . I have downloaded and installed: pythonnet‑2.0.0.dev1‑cp27‑none‑win_amd64.whl. I can imagine that it will works for .NET 4.0 sinceRequires the Microsoft .NET Framework 4.0. Once I have installed everything, I can do these commands: >>> import clr >>> import System >>> print System.Environmnet.Version >>> print System.Environment.Version 4.0.30319.34209It seems work. Then, I have tried to load my dll typing these commands: >>> import clr >>> dllpath= r'C:\Program Files\API\Test.NET' >>> clr.AddReference(dllpath) Traceback (most recent call last): File "<pyshell#20>", line 1, in <module> clr.AddReference(dllpath) FileNotFoundException: Unable to find assembly 'C:\Program Files\API\Test.NET'. at Python.Runtime.CLRModule.AddReference(String name)I have also tried to add '.dll' at the end of the path but nothing changed. Then, I have also tried different solutions as described in:http://stackoverflow.com/questions/14633695/how-to-install-python-for-ne… and much more.... Unfortunately, it doesn't work and I get different errors. I know that exists IronPython but I was trying to avoid to use it. Thanks for your help!

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Decref in RunString
by Nils Becker 08 Jun '15

08 Jun '15

Hello there, I have a quick question concerning the "RunString(string code, IntPtr globals, IntPtr locals)" routine. In it the parameter "locals" is decref'ed. Maybe I am missing something (could be, I do not know much about reference counting), but should something which the user passes be decref'ed? My use case is the following: I embed python into C# and have a stateful wrapper around PythonEngine which manages a global and local dictionary. Therefore, I need the local dictionary I pass to RunString to be accessable (and sane) after the call. I noticed that locals contained random content after I called RunString and created new variables in the code. After I removed the Decref call in RunString, it seems to work as I would expect it to. Cheers Nils

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