Mailman 3 November 2007 - Python.NET

accessing managed VB.NET dll
by Vladislav Petyuk Nov. 29, 2007

Nov. 29, 2007

I'm sorry for such a basic question, but I can not find an answer on it in the mail archive or manual. I have a VB dll which uses .NET and I need to instantiate a certain class and call a certain method. It sounds like clr, since its a managed dll, would be a right library to use. So what is the right way to do this? I was successful in using ctypes for calling functions from native C dlls, but it seems not to work this time (or I'm missing something). Thanks, Vlad

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bridging C# and Python
by Matt Mackowski Nov. 28, 2007

Nov. 28, 2007

Hi, I would like to run a python application have it call a C# application and have the two applications be able to call functions in the other application. I have gotten the python to open and run the C# application and I am able to run any function from the C# app in python. What I am having trouble with is calling python functions from the C# when the C# app was started by a python call. When I run the C# alone I can call the python functions. Part of my problem I think is that the C# app doesn't know where to fine the python modules. Where do they need to be if I want to use the PythonEngine.ImportModule? In python my codes looks like this import clr import pythoncom clr.AddReference("ScriptEditor") from ScriptEditor import ScriptEditor self.app = ScriptEditor() clr.AddReference("System.Windows.Forms") from System.Windows.Forms import Application Application.Run(self.app) ScriptEditor is my C# app. I can call most of the C# functions from python with the above code. The C# functions I cannot call are ones that use python for example //---------------------------------------------------------------------- --------------------------- public void usingPython() //---------------------------------------------------------------------- --------------------------- { PythonEngine.Initialize(); IntPtr pyLock = PythonEngine.AcquireLock(); PyObject pyObj = PythonEngine.ImportModule("hello"); pyObj.InvokeMethod("helloCallback", new PyTuple()); PythonEngine.ReleaseLock(pyLock); PythonEngine.Shutdown(); } That doesn't work. It works when I call the function in C#. Hello.py looks like this: def hello(): return 'hello' def helloCallback(): print "This is a Test and Of The python.net" Thanks Matt

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Pithon.net or iron python??
by Jose Ignacio Gisbert Nov. 23, 2007

Nov. 23, 2007

Hi all, I am developing an application which Graphic interface is in C#, but I want to call methods in some situations (when press certain button) that are coded in Python. First, it can be possible to mix both languages?, and second, What should I do, use Iron Python or Pithon.net?. Sorry for my ignorance. Thanks in advance _______________________________ José Ignacio Gisbert Sanus

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Added 64-bit support, delegates/events broken?
by John Burnett Nov. 21, 2007

Nov. 21, 2007

(re-posting to break it out of the Ubuntu thread... my bad, sorry) I've made a few changes necessary to make python.net 64-bit compatible. I can check in the changes on Monday (unless I need an account set up first?) I also fixed a broken test case wrt. exceptions. That said, I'm getting unrelated hard crashes when running the test cases for either events or delegates (i.e. the whole test harness crashes out). Is anyone else seeing this, or is it something peculiar with my setup (it's happening in both 32 and 64 bit Vista, compiled under VS2005). I can post details on Monday if necessary... John

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Re: [Python.NET] Configuration on Ubuntu: Assembly not found error...
by Christian Heimes Nov. 18, 2007

Nov. 18, 2007

jimh wrote: > Yes both the dev packages are installed. Here's the error I get. > /usr/bin/python2.4 setup.py build_ext -i > /usr/bin/python2.4: can't open file 'setup.py': [Errno 2] No such file > or directory > > I don't see a setup.py in the package on sourceforge. Oh yeah, I see the problem. The setup.py file isn't in the package. I forgot to add it. You can grab the file from subversion. Christian

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Configuration on Ubuntu: Assembly not found error...
by Jim Nov. 18, 2007

Nov. 18, 2007

My python is 2.4 UCS4 on Ubuntu 7.10. I was able to build the Python.Runtime.dll. I used the pre-built clr.so (wouldn't build) and copied it to /usr/lib/python2.4/site-packages. I also built a special python2.4 dynamically linked to libpython. I copied Python.Runtime.dll to /usr/bin (same location as my python2.4), but when try "import clr" I get the error "Assemblies not found". However when I launch python2.4 in the same directory as Python.Runtime.dll the "import clr" works without error. Alsp clrpython2.4 crashes unless I launch it in the same directory is Python.Runtime.dll. Obviously python is not finding my Python.Runtime.dll. Where should this file be copied so that it can be found no matter where python is launched? J

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Python Extension in C#?
by jane janet Nov. 14, 2007

Nov. 14, 2007

Hello all, Please tell me how can I create .dll for Python in C#? Every advice would be great. Thank you. All the best, _________________________________________________________________ Windows Live Hotmail and Microsoft Office Outlook – together at last. Get it now. http://office.microsoft.com/en-us/outlook/HA102225181033.aspx?pid=CL1006269…

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Can I create extension file by C#?
by jane janet Nov. 6, 2007

Nov. 6, 2007

Hello all, I wanna to know that can i create any extension file or DLL file by using C# and if it can I wanna know how to do too. Please help me. Thank you. _________________________________________________________________ Peek-a-boo FREE Tricks & Treats for You! http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us

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What can I do with DLL?
by jane janet Nov. 6, 2007

Nov. 6, 2007

Hello all, I'm a student. I wanna know how to do about my project. I implemented aplication using Ironpython because I have to use .NET library and c# code but I also have to use this application with another Python implemented application. My teacher want me to create DLL file of IronPython implemented application. I don't know how to begin. Please help me. Thank you. All the best. _________________________________________________________________ Boo! Scare away worms, viruses and so much more! Try Windows Live OneCare! http://onecare.live.com/standard/en-us/purchase/trial.aspx?s_cid=wl_hotmail…

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FromManagedObject and Booleans
by Michael Foord Nov. 2, 2007

Nov. 2, 2007

Hello all, I'm using the Python.Runtime assembly to provide access to CPython modules from IronPython. I'm converting objects that pass from CPython to IronPython (and vice-versa) by converting datatypes or proxying access. To convert to CPython types I use "PyObject.FromManagedObject(obj)" where possible and do type specific conversion for other types. Unfortunately "PyObject.FromManagedObject(obj)" doesn't work for booleans and passing in booleans to CPython doesn't result in 'True' or 'False', but a 'System.Boolean' instead. As a workaround I'm using: @GIL def _getBools(): "Hack because 'FromManagedObject' doesn't work for bools" builtin = engine.ImportModule('__builtin__') return {False: builtin.GetAttr('False'), True: builtin.GetAttr('True')} _bools = _getBools() Is the fact that "PyObject.FromManagedObject(obj)" doesn't work for booleans a bug? (Or is there an alternative method you can suggest?) All the best, Michael Foord http://www.manning.com/foord

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