C# jagged arrays and lists make Unity crash the second time #1713
Description
Environment
- Pythonnet version: 3.0.0-preview2022-03-03
- Python version: 3.8.9
- Operating System: Windows 10
- .NET Runtime: 4
- Unity 2020.3.12f1
Details
- Describe what you were trying to get done.
Trying to send a jagged array or List of float 1D array to Python via C# in Unity. This works the first time I press play in Unity but crashes on the second time without any errors.
- See below for a C# script that creates a normal 2D array, a jagged array and a listarray. If I send the normal array, it works fine restarting. However the jagged array and list do make unity crash if I press play for a second time.
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using Python.Runtime;
public class MinimalExample : MonoBehaviour
{
float[,] twoDimArray = null;
float[][] jaggedArray = null;
List<float[]> listArray = new List<float[]>();
void Start()
{
//Adjust the line below to your target python version in the correct folder
Runtime.PythonDLL = Application.dataPath + "/StreamingAssets/embeddedPy/python38.dll";
for (int i = 0; i<2; i++)
{
float[] temp = { 1.2345679f, 9.87654321f, 1.23456789f};
listArray.Add(temp);
}
twoDimArray = new float[,] { { 1.2345679f, 9.87654321f, 1.23456789f }, { 1.2345679f, 9.87654321f, 1.23456789f } };
jaggedArray = listArray.ToArray();
SendToPython(twoDimArray, jaggedArray, listArray);
}
void SendToPython(float[,] ex2, float[][] ex3, List<float[]> ex4)
{
using (Py.GIL())
{
dynamic py_sys = Py.Import("sys");
string site_pkg = "Lib\\site-packages";
py_sys.path.insert(0, Path.Combine(Application.streamingAssetsPath, site_pkg));
dynamic pythonScript = Py.Import("MinimalExample");
//If we use ex2 here as input, restarting inside unity works. Restarting does not work for ex3 and ex4
dynamic returnedValue = pythonScript.ReturnValue(ex2);
Debug.Log(returnedValue);
}
}
}import numpy as np
def ReturnValue(data):
result = np.asarray(data)
return result- A simple solution is to transform my jagged arrays and lists to normal arrays. However I was wondering if I am doing something wrong or this is indeed an unknown bug.