Mailman 3 August 2007 - Python.NET

How to use Dll-methods with [out]-arguments and no constructor for the argument-class
by Pär Sundbäck Aug. 25, 2007

Aug. 25, 2007

Hi I am using Python .Net together with PythonWin 2.5. My task is to use a .Net assembly dll from a python testscript. The dll is written i C# to create interfaces by refering them as [out]arguments. I am supposed to be sending a reference to a datatype/interface and then get a handle to that created interface for further processing. The original C# method in the dll looks something like: HResult=CreateInstance([out] ICHardware hw) In python I receive this (ofcourse) when using the class (not instance) of the datatype as argument: >>> hw=ICHardware >>> ICProductFactory.CreateInstance(hw) Traceback (most recent call last): File "<interactive input>", line 1, in <module> TypeError: No method matches given arguments My problem is that I can not create an instance of ICHardware from Python since the constructor is hidden in the dll (or not in there at all). In C# I would do like this when using the dll: ICHardware hw; ICProductFactory.CreateInstance(hw); hw.Method.... In Python this is not possible since I can not declare a variable without assign a value or running the constructor, or? Maybe someone knows a work-around for this. I'll be happy for all feedback. Regards /Pär -- Jag använder gratisversionen av SPAMfighter för privata användare. 4941 spam har blivit blockerade hittills. Betalande användare har inte detta meddelande i sin e-post. Hämta gratis SPAMfighter här: http://www.spamfighter.com/lsv

1 0

PythonNet news
by Christian Heimes Aug. 3, 2007

Aug. 3, 2007

Good evening Python for .NET users! I've a list of great news for you. In the past weeks I've spent some time in fixing and enhancing PythonNet. Summary: * My branch was merged into the trunk yesterday. Please use the trunk for future development. * PythonNet now works with Python 2.4 and 2.5. Python 2.6 compatibility is already prepared. * A bunch of small bugs were fixed and some new features implemented. Generics, overloading and variable parameter function should work better. * PythonNet also works under Un*x and Mono with UCS 2 and UCS 4 builds of Python. I've created a clr.so module since the clr.pyd module doesn't work on non Windows OS. I've also created a python and clrpython binary for Debian, Ubuntu and other users with a python binary not linked against libpython2.x.so. Two additional unit tests are currently failing. * The source repository contains project files for MS Visual Studio and MonoDevelop. The MS VS files contain a special target which automatically runs the unit tests in a console window. * A new one-size-fits-all Makefile makes it much easier to compile PythonNet for different versions of Python. It automatically detects UCS 2/4 settings and Python version from a Python binary: $ make PYTHON=/path/to/python * The clr module provides new features: AddReference, ListAssemblies(verbosity), preload Christian

2 3

Packages are wrongly initialized?
by Alberto Berti July 31, 2007

July 31, 2007

Hi all, i'm in the process of embedding python in a C# application. After initializing the engine, my application imports via (ImportModule) a custom package which contains the python side of my code. doing the following code raises an AttributeError Exception: PyObject pypackage = PythonEngine.ImportModule('pypackage'); PyObject sub_module = pypackage.GetAttr('sub_module'); <-- raises the exception here One other thing that isn't working is a non empty __init__.py inside the package; trying to import any symbol defined in the __init__.py also raises an AttributeError. instead, this line works as expected: PyObject pypackage = PythonEngine.ImportModule('pypackage.submodule'); I've tried the code with the old trunk and with the newer Christian's one. am I doing something wrong? Anyone as any clue? thanks in advance Alberto

3 3