UnityPython is a plugin for Unity3D that provides support for running Python 2.x code in Unity3D on any platform which supports System.Reflection.Emit.

Special thanks to the developers of IronPython who developed the open-source integration of Python and .NET, which this plugin uses.

The build target must support System.Reflection.Emit. In the Unity3D docs, you can find an up-to-date detailed list of which platforms support Emit or not here.

As of Unity3D 2019.4 LTS, here is a chart of platform support for Emit:

* Unconfirmed, as Unity states that UWP (.NET) uses a ".NET Core class libraries subset" but fails to state what libraries are included in that subset. If you know the answer to this question, please open a PR.

There are three different ways to use this library in Unity:

• Use the Add package from git URL... option in Unity's package manager and use the git URL of this repository.
• Clone this repository into your Unity project. Or, if your Unity project is already a git repository, add this repository as a submodule.
• Download and install the latest .unitypackage release

Then, go to Edit > Project Settings > Player > Other Settings > Configuration and change Api Compatability Level to ".NET 4.x"

An example is provided below. More examples can be found in the Examples/ folder.

using UnityEngine;
using IronPython.Hosting;

public class HelloWorld : MonoBehaviour
{
	void Start()
	{
		var engine = Python.CreateEngine();
		var scope = engine.CreateScope();

		string code = "str = 'Hello world!'";

		var source = engine.CreateScriptSourceFromString(code);
		source.Execute(scope);

		Debug.Log(scope.GetVariable<string>("str"));
	}
}