Mailman 3 জুলাই 2015 - Python.NET

Multithreading/multiprocessing
by Alan Macdonald 5 মে, 2025

5 মে, 2025

Hello, has anyone successfully used multithreading or multiprocessing with Python.Net? I tried to multi-thread from the .Net side and the Python.Net libraries seem to have issues in the RunScript method. I had to take an implementation off the web of that method because the shipped method doesn’t seem to work. I then had a working multi-processing example from CPython that I tried from Python.Net but it gives an error 'module' object has no attribute 'argv' When trying to create a process pool by executing the line pool = Pool(processes=4) Is it possible to do multithreading or multiprocessing with Python.Net? Thanks, Alan

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PythonNet on Cygwin
by Nikhil Garg 21 জুন, 2017

21 জুন, 2017

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 21 মে, 2017

21 মে, 2017

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 7 সেপ্টেম্বর, 2016

7 সেপ্টেম্বর, 2016

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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Debugging CPYTHON embedded in .NET
by Denis Akhiyarov 31 জানুয়ারি, 2016

31 জানুয়ারি, 2016

Dear users and developers of PythonNET: How do you debug CPython embedded in . NET? Did you find any reliable way to do this with IDE such as PTVS or Pycharm? PTVS offers mixed-mode and remote debugging, none of which seem to be usable with PythonNET. Thanks, Denis

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pythonnet 2.0.0 released
by Tony Roberts 29 জানুয়ারি, 2016

29 জানুয়ারি, 2016

Hi, I've finally gotten round to finishing off the last couple of things that were blocking an 'official' 2.0.0 release (to do with packaging as wheels/source dist). There is now a 2.0.0 release available on PyPI ( https://pypi.python.org/pypi/pythonnet), with binary wheels for Windows (32 and 64 bit) and a source distribution for Linux and Mac. The next task will be to integrate the changes from the renshawbay/pythonnet fork to add Python 3 support. cheers, Tony

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Getting an open Python file handle into CLR
by Dan Lenski 21 জুলাই, 2015

21 জুলাই, 2015

Hi, I posted this on StackOverflow but thought it might be a better question for this mailing list. http://stackoverflow.com/questions/31530059/how-can-i-open-a-net- filestream-object-from-a-python-file-handle I'm trying to figure out how to transform an open Python file handle into a System.IO.FileStream object so that I can pass it to C# code. Here's what I've got so far. This produces the good ol' win32 (HANDLE*) object, I believe: import clr, msvcrt from Microsoft.Win32.SafeHandles import SafeFileHandle from System.IO import FileStream, FileAccess from System import IntPtr, Int32, Int64 pyf=open("c:/temp/testing123.txt","w") fileno=pyf.fileno() print fileno # 6 handle = msvcrt.get_osfhandle(fileno) print handle # 1832L Unfortunately, I can't figure out how to convince the clr module to cast this handle into something that I can use as an IntPtr, as required by the constructors of FileStream or SafeFileHandle. I've tried various versions of the following, but they all give me TypeError ("value cannot be converted to System.IntPtr"): FileStream(IntPtr(handle), True) FileStream(IntPtr(Int32(handle), True) SafeFileHandle(IntPtr(handle), True) Thanks, Dan Lenski

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python.net and autocompletion
by germano carella 6 জুলাই, 2015

6 জুলাই, 2015

Hi, I'm attempting to write a python IDE accessible for blind persons. I'm a blind programmer and I need it to develop my applications. I'd like to create an autocompletion db containing all modules, functions, classes that a developer can use. Now, there is a way, with clr module, to retrieve list of available modules to import? Or, there is a way to implement a c# class that makes it possible? Thanks! Germano

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Action delegate in Python 3.4
by Tamas Ruszkai 1 জুলাই, 2015

1 জুলাই, 2015

I have installed CPython 3.4 64bit and pythonnet-2.1.0.dev1-cp34-none-win_amd64.whl I have tried to use the generic action delegate, but failed. Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:44:40) [MSC v.1600 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import clr >>> clr.AddReference("System") <System.Reflection.RuntimeAssembly object at 0x0000000002DFAC18> >>> import System >>> def hello(number): ... print(number) ... >>> deleg = System.Action[int](hello) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: unsubscriptable object >>> However when I want to instantiate a genrics dictionary then it works. >>> clr.AddReference("System.Collections") <System.Reflection.RuntimeAssembly object at 0x0000000002397550> >>> import System.Collections.Generic >>> dict = System.Collections.Generic.Dictionary[int,str]() >>> dict[5]="asd" >>> print(dict[5]) asd

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