PythonNet June 2022

pythonnet@python.org

3 participants
2 discussions

[Pythonnet] Python to c# long conversion time
by Jordan GUILLOT 29 Jun '22

29 Jun '22

Hi, I'm using Pythonnet to import proprietary python package from Windows Application. When my python package return a large byte array in C# world, the type conversion takes lot of time. To illustrate this long conversion time, I made a simple example: 1. A Python package with a method which return a byte array: class MyClass: @staticmethod def get_bytes_from_py(): array = np.arange(0, 720000, dtype=np.uint8) return bytes(array) 1. An application console to call my Python package and which convert 'bytes' type into 'byte[]' type static void Main(string[] args) { Runtime.PythonDLL = "c:\\Python38\\python38.dll"; PythonEngine.Initialize(); Stopwatch st = new Stopwatch(); st.Start(); using (Py.GIL()) { dynamic myPackage = Py.Import("mypackage"); dynamic myClass = myPackage.MyClass(); dynamic myPyByteArray = myClass.get_bytes_from_py(); long t0 = st.ElapsedMilliseconds; byte[] myCsharpByteArray = myPyByteArray; long t1 = st.ElapsedMilliseconds; Console.WriteLine("Conversion takes {0}ms", t1-t0); } st.Stop(); } 1. The console output: "Conversion takes 303ms" Is this the right way for this conversion? Environment: Python: v3.8.10 Pythonnet: * Pypi: v2.5.2 * Nuget : 3.0.0-preview2022-06-03 Windows 10 Pro .NET framework 4.7.2 Regards, Jordan GUILLOT

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pythonnet with .Net6 demo
by Emmanuel Rutovic 10 Jun '22

10 Jun '22

Hi there, I feel that there is a lot of interest in using pythonnet with modern flavors of .Net and without .Net Framework/Mono. In fact, it's already possible using the latest preview packages, even if the documentation isn't updated. I made this very simple minimal demo: https://github.com/aesim-tech/pythonnet_minimal. It demonstrates how to use pythonnet with .Net6 and how to use encoders. Note: I am not involved in the development of Pythonnet, so It might not be the best approach. It is what I understood looking at the source code. I hope this helps. Cheers, -- *Emmanuel Rutovic* Founder, AESIM.tech Book a meeting with me <https://meetings.hubspot.com/manu27> +1 (438) 926-6458

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PythonNet June 2022