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https://github.com/exodrifter/unity-python

Python plugin for Unity3D.
https://github.com/exodrifter/unity-python

python unity3d

Last synced: 7 months ago
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Python plugin for Unity3D.

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# Warning
**This repository is no longer maintained.** This repository will not be
updated and I will not respond to support requests. There are a few reasons
for why this is:

* Python 2 was deprecated on January 1, 2020.
* As of this writing, IronPython does not have a stable release for Python 3.
* Updating to newer versions of IronPython for Python 2 does not appear to be
straightforward as IronPython links against newer versions of DLLs that
Unity uses.
* pip dropped support for Python 2 in January 2021
* I no longer use Unity.

This makes it difficult for me to keep the repository up to date and provide
support. If you are interested in taking over, I would recommend putting
your energy towards moving to Python 3 using IronPython 3 instead of
continuing to use IronPython 2. Let me know if this is what you would like to
do; I can provide some limited advice based on my experience making this
library and I can redirect users to your library when it's ready.

# UnityPython
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.

## Requirements
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](https://docs.unity3d.com/Manual/ScriptingRestrictions.html).

As of Unity3D 2019.4 LTS, here is a chart of platform support for `Emit`:
| Platform (scripting backend) | Is `System.Reflection.Emit` supported? |
|-------------------------------------|----------------------------------------|
| Android (IL2CPP) | No |
| Android (Mono) | Yes |
| iOS (IL2CPP) | No |
| PlayStation 4 (IL2CPP) | No |
| PlayStation Vita (IL2CPP) | No |
| Standalone (IL2CPP) | No |
| Standalone (Mono) | Yes |
| Switch (IL2CPP) | No |
| Universal Windows Platform (IL2CPP) | No |
| Universal Windows Platform (.NET) | Maybe\* |
| WebGL (IL2CPP) | No |
| WiiU (Mono) | Yes |
| XBox One (IL2CPP) | No |

\* 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.

## Setup
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][releases]

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

## Usage
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("str"));
}
}

[releases]: https://github.com/exodrifter/unity-python/releases
[discussions/36]: https://github.com/exodrifter/unity-python/discussions/36