Unity 捕获IronPython脚本错误

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using?System;
using?System.Collections.Generic;
using?System.IO;
using?System.Reflection;
using?System.Text;
using?System.Windows.Forms;

using?IronPython.Hosting;
using?IronPython.Runtime;
using?IronPython.Runtime.Exceptions;
using?Microsoft.Scripting;
using?Microsoft.Scripting.Runtime;
using?Microsoft.Scripting.Hosting;

using?Plugins;


namespace?EmbeddingPlugin
{
????internal?class?PythonStream:?MemoryStream
????{
????????TextBox?_output;
????????public?PythonStream(TextBox?textbox)
????????{
????????????_output?=?textbox;
????????}

????????public?override?void?Write(byte[]?buffer,?int?offset,?int?count)
????????{
????????????_output.AppendText(Encoding.UTF8.GetString(buffer,?offset,?count));
????????}
????}

????internal?class?Engine
????{
????????ScriptEngine?_engine;
????????ScriptRuntime?_runtime;
????????TextBox?_box;

????????public?List<PluginBase>?Plugins
????????{
????????????get?{?return?PluginStore.Plugins;?}
????????}


????????public?Engine(TextBox?textbox)
????????{
????????????_engine?=?Python.CreateEngine();
????????????_runtime?=?_engine.Runtime;
????????????_box?=?textbox;

????????????SetStreams();
????????????string?rootDir?=?AddAssemblies();
????????????LoadPlugins(rootDir);
????????}

????????public?void?SetStreams()
????????{
????????????PythonStream?stream?=?new?PythonStream(_box);
????????????_runtime.IO.SetOutput(stream,?Encoding.UTF8);
????????????_runtime.IO.SetErrorOutput(stream,?Encoding.UTF8);
????????}

????????public?string?AddAssemblies()
????????{
????????????Assembly?mainAssembly?=?Assembly.GetExecutingAssembly();

????????????string?rootDir?=?Directory.GetParent(mainAssembly.Location).FullName;
????????????string?pluginsPath?=?Path.Combine(rootDir,?"Plugins.dll");

????????????Assembly?pluginsAssembly?=?Assembly.LoadFile(pluginsPath);

????????????_runtime.LoadAssembly(mainAssembly);
????????????_runtime.LoadAssembly(pluginsAssembly);
????????????_runtime.LoadAssembly(typeof(String).Assembly);
????????????_runtime.LoadAssembly(typeof(Uri).Assembly);

????????????return?rootDir;
????????}

????????public?void?LoadPlugins(string?rootDir)
????????{
????????????string?pluginsDir?=?Path.Combine(rootDir,?"plugins");
????????????foreach?(string?path?in?Directory.GetFiles(pluginsDir))
????????????{
????????????????if?(path.ToLower().EndsWith(".py"))
????????????????{
????????????????????CreatePlugin(path);
????????????????}
????????????}
????????}

????????public?void?CreatePlugin(string?path)
????????{
????????????try
????????????{
????????????????ScriptSource?script?=?_engine.CreateScriptSourceFromFile(path);
????????????????CompiledCode?code?=?script.Compile();
????????????????ScriptScope?scope?=?_engine.CreateScope();
????????????????script.Execute(scope);
????????????}
????????????catch?(SyntaxErrorException?e)
????????????{
????????????????string?msg?=?"Syntax?error?in?\"{0}\"";
????????????????ShowError(msg,?Path.GetFileName(path),?e);
????????????}
????????????catch?(SystemExitException?e)
????????????{
????????????????string?msg?=?"SystemExit?in?\"{0}\"";
????????????????ShowError(msg,?Path.GetFileName(path),?e);
????????????}

????????????catch?(Exception?e)
????????????{
????????????????string?msg?=?"Error?loading?plugin?\"{0}\"";
????????????????ShowError(msg,?Path.GetFileName(path),?e);
????????????}
????????}

????????public?void?ShowError(string?title,?string?name,?Exception?e)
????????{
????????????string?caption?=?String.Format(title,?name);
????????????ExceptionOperations?eo?=?_engine.GetService<ExceptionOperations>();
????????????string?error?=?eo.FormatException(e);
????????????MessageBox.Show(error,?caption,?MessageBoxButtons.OK,?MessageBoxIcon.Error);

????????}

????????public?void?ExecutePluginAtIndex(int?index)
????????{
????????????PluginBase?plugin?=?Plugins[index];

????????????try
????????????{
????????????????plugin.Execute(_box);
????????????}
????????????catch?(Exception?e)
????????????{
????????????????string?msg?=?"Error?executing?plugin?\"{0}\"";
????????????????ShowError(msg,?plugin.Name,?e);
????????????}
????????}
????}
}