Mailman 3 March 2016 - Python.NET

PythonNet on Cygwin
by Nikhil Garg 21 Jun '17

21 Jun '17

Hi Guys, I was wondering if anyone knows how to make Python for .Net work on cygwin installation of python. I have been looking around and find a mixed bag of information. If anyone knows of the working version of Python for .Net and its dependency, I would appreciate if you could share it with me. Currently, I am using a generic windows version and it works just fine, but I need it to work on Cygwin version of python. I appreciate any helpful replies. Thanks, Nikhil

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cx_freeze and python.net
by Boris Burdin 22 May '17

22 May '17

Hello everybody, I'm trying to build a python.net application using cx-freeze . Once the application is built, I put in my final folder the Python.Runtime.dll. but it stil doesn't seem to work . Actually, when I run the .exe file, nothing is happening. So, I wonder if there were something else to do, another dll to put in the folder, or any option to use with cx_freeze when building the application ? i would be very grateful if you could help me on this matter .. Thanks in advance, Boris

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pythonnet appdomain(s)
by Adam Klein 07 Sep '16

07 Sep '16

Hello, Is there a design reason that pythonnet loads C# assemblies into its own AppDomain rather than establishing a separate AppDomain? It would be useful for instance when developing in C# in parallel with writing python code (say, in the ipython REPL) to be able to reload C# assemblies dynamically. Also, we've found it useful in Initialize() to enable shadow copying, to prevent file locking, ie internal static void Initialize() { ... AppDomain domain = AppDomain.CurrentDomain; // prevent file locking domain.SetShadowCopyFiles(); domain.SetShadowCopyPath(null); Although these are deprecated methods, and really it should be establishing a new AppDomain as above. Regards, Adam _________________________________ Adam D Klein BlueMountain Capital Management LLC 280 Park Ave, 5th Floor East New York, NY 10017 O:(212)905-2136 C:(917)331-8871

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pyinstaller + pythonnet
by Nikhil Garg 19 Jun '16

19 Jun '16

Hi All, I tried to build a very simple executable using pyinstaller, where my script just imported clr module. I managed to build the executable but then the executable doesnt run. I have posted the error below. I think the executable is able to find the runtime dll but it is unable to run it. Unhandled Exception: System.IO.FileLoadException: Could not load file or assembl y 'Python.Runtime, Version=4.0.0.1, Culture=neutral, PublicKeyToken=5000fea6cba7 02dd' or one of its dependencies. The located assembly's manifest definition doe s not match the assembly reference. (Exception from HRESULT: 0x80131040) at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String cod eBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntro spection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName as semblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMar k& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIn trospection, Boolean suppressSecurityChecks) at System.Reflection.Assembly.Load(AssemblyName assemblyRef) at clrModule.initclr() I would appreciate any help

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PyTuple IDisposable implementation
by Steven Burns 31 Mar '16

31 Mar '16

I'm creating PyTuple instances using the constructor. I noticed the constructor calls Runtime.Incref for each of the tuple elements. But PyTuple doesn't override PyObject's implementation of IDisposable. It's not clear to me when this references will be cleared. Thanks, Steven

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Can a python class passed back to .Net
by Hansong Huang 17 Mar '16

17 Mar '16

This might be an obvious problem out of my lack of understanding how Python.Net work. I am exploring the possibility of program WPF ViewModel. After resolving the problem inheriting .Net interface class, class ViewModel(System.ComponentModel.INotifyPropertyChanged): __namespace__ = "WPFPy" .... class MyViewModel(ViewModel): .... here to implement follow ironpython examples then assign it to DataContext self.window = System.Windows.Markup.XamlReader.Load(outStream) self.window.DataContext = MyViewModel() this does not seem to work, the property/method in MyViewModel is never called nor any data binding happened. I was able to get ExpandoObject work well though and binding works fine self.window.DataContext = System.Dynamic.ExpandoObject() so, that makes me asking if it makes sense at all to pass a Python class object back into .Net framework and expect it works -- even if the proper interface is implemented. thanks

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How to make the distribution of python and python in a single exe file?
by Simone Reis 16 Mar '16

16 Mar '16

How to make the distribution of python and pythonNet in a single exe file? I tried with py2exe and pyinstaler but always occur error in clr.pyd load. It only works when clr.pyd and Python.Runtime.dll are in the same folder and not compressed. Thanks

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Can Python.Net inherit .Net Interface Class
by Hansong Huang 14 Mar '16

14 Mar '16

I am attempting to implement a MVVM WPF application in Python.Net. The ViewModel class needs to implement the INotifyPropertyChanged interface. class ViewModel(System.ComponentModel.INotifyPropertyChanged): def __init__(self): pass vm = ViewModel() gives exception: "TypeError: interface takes exactly one argument" I am not sure what is the reason. I remember a post last year saying the the interface inheritance is implemented in a development brand and not integrated into main branch. not sure if it is the reason. I am using python 2.1.0.dev1. thanks

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