Mailman 3 আগস্ট 2018 - 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

2 1

Invoking a C# method with a python list
by Mohamed Koubaa 24 সেপ্টেম্বর, 2018

24 সেপ্টেম্বর, 2018

Hello, I am using the 2.3 release branch. I have C# code like this: public class A { public A() {...} } public class B { public B() {...} public static void Func(IEnumerable<A> input){ } } I want to pass in a python list to Func but get this error: >>> b=B() >>> b.Func([A(), A()]) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: No method matches given arguments I tried both IEnumerable and IList in the signature of 'Func'. I know that I can import System and create some .NET collection type and it works well. Did I miss anything? Is this usage pattern within the design goals of pythonnet? I assume this would have to be fixed in MethodBinder but I wanted to try asking here first. Thanks! Mohamed Koubaa

2 2

Looking for experts in msbuild/nuget
by Denis Akhiyarov 31 আগস্ট, 2018

31 আগস্ট, 2018

We are having some pythonnet build issues on Travis CI with Mono. Here is a bounty I opened on stackoverflow, if someone knows how to solve this error: https://stackoverflow.com/questions/51988395/build-failures-with-mono-5-14-…

1 0

Passing System Pointer as Byte*
by brice.thurin＠buhlergroup.com 24 আগস্ট, 2018

24 আগস্ট, 2018

Good Afternoon, I have a class from a third party DLL with the following Buffer.Attach method: public void Attach( byte* aBuffer, uint aSize) The method can be called from C# using: aBuffer.Attach( (byte*) arrPointer , nBytes) where arrPointer is a System.Reflection.Pointer How can I call the method using Python.Net. If I pass only the arrPointer to the method I receive a TypeError: No method matches given arguments. In other word, how can I perform the type casting in python? Thank you in advance for any help. Best Regards, Brice ________________________________ This e-mail (including any attachments) is confidential, may be legally privileged and is designated exclusively for the intended recipient. If you are not the intended recipient, please immediately delete this e-mail and notify the sender by phone or by e-mail. We process personal data in accordance with our privacy policy available at: www.buhlergroup.com/privacy.

1 0

Python.Net crash on assembly reload in Unity
by Viktoria Kovecses 9 আগস্ট, 2018

9 আগস্ট, 2018

Hello, We are experiencing crashes when running Python.Net in the Unity 2018.2 game engine. Specifically, after modifying a C# script in Unity, an automatic reload is triggered which results in a crash in Py_Finalize. Here are the repro steps: 0. Make sure to call PythonEngine.Shutdown on domain unload (otherwise it crashes earlier). 1. Create a Unity project and add the compiled Python.Net files (clr.pyd and Python.Runtime.dll) to the Assets folder 2. In Unity Player Settings (Edit > Project Settings > Player), under "Other Settings", make sure "Api Compatibility Level" is set to ".NET 4.x", and "Scripting Runtime Version" is set to ".NET 4.x Equivalent" 3. In Assets, create the following C# script (HelloWorld.cs): ``` using UnityEditor; using UnityEngine; using Python.Runtime; class HelloWorld { [MenuItem("Python/Hello")] public static void CallHello() { using (Py.GIL()) { string script = "import clr\n" + "clr.AddReference('UnityEngine.dll')\n" + "import UnityEngine\n" + "UnityEngine.Debug.Log('hello world!')\n"; PythonEngine.Exec(script); } } } ``` 4. Run the script by selecting Python > Hello from the top menu --> This will log "hello world!" to the Unity console 5. Modify HelloWorld.cs script: change Hello to Hello 1 and trigger hot reloading of assemblies 6. run Python > Hello 1 --> Logs in the console 7. Modify HelloWorld.cs script: change Hello 1 to Hello 2: --> crash in dict_traverse (garbage collection during Py_Finalize). Does anyone know what could be causing the crash and/or how to fix it? Any help is appreciated. Thank you, Viktoria

2 1

Python.Net crash on assembly reload in Unity
by Viktoria Kovecses 2 আগস্ট, 2018

2 আগস্ট, 2018

Hello, We are experiencing crashes when running Python.Net in the Unity 2018.2 game engine. Specifically, after modifying a C# script in Unity, an automatic reload is triggered which results in a crash in Py_Finalize. Here are the repro steps: 0. Make sure to call PythonEngine.Shutdown on domain unload (otherwise it crashes earlier). 1. Create a Unity project and add the compiled Python.Net files (clr.pyd and Python.Runtime.dll) to the Assets folder 2. In Unity Player Settings (Edit > Project Settings > Player), under "Other Settings", make sure "Api Compatibility Level" is set to ".NET 4.x", and "Scripting Runtime Version" is set to ".NET 4.x Equivalent" 3. In Assets, create the following C# script (HelloWorld.cs): ``` using UnityEditor; using UnityEngine; using Python.Runtime; class HelloWorld { [MenuItem("Python/Hello")] public static void CallHello() { using (Py.GIL()) { string script = "import clr\n" + "clr.AddReference('UnityEngine.dll')\n" + "import UnityEngine\n" + "UnityEngine.Debug.Log('hello world!')\n"; PythonEngine.Exec(script); } } } ``` 4. Run the script by selecting Python > Hello from the top menu --> This will log "hello world!" to the Unity console 5. Modify HelloWorld.cs script: change Hello to Hello 1 and trigger hot reloading of assemblies 6. run Python > Hello 1 --> Logs in the console 7. Modify HelloWorld.cs script: change Hello 1 to Hello 2: --> crash in dict_traverse (garbage collection during Py_Finalize). Does anyone know what could be causing the crash and/or how to fix it? Any help is appreciated. Thank you, Viktoria

1 0