Unity3D: Example of post process build

ProcessBuild.cs

using UnityEditor;
using UnityEditor.Callbacks;

using System.Diagnostics;
using System.IO;

public static class ProcessBuild
{
	[PostProcessBuild(1000)]
	public static void OnPostProcessBuild(BuildTarget target, string pathToBuiltProject)
	{
		var process = new Process();
		process.StartInfo.FileName = "python2.6";
		process.StartInfo.Arguments = string.Format("{0}/Scripts/python_script.py {1}", Directory.GetCurrentDirectory(), pathToBuiltProject);
		process.StartInfo.UseShellExecute = false;
		process.StartInfo.RedirectStandardOutput = true;
		process.StartInfo.RedirectStandardError = true;
		process.Start();

		string err = process.StandardError.ReadToEnd();
		process.WaitForExit();

		if (process.ExitCode != 0)
		{
        		UnityEngine.Debug.LogError("error: " + err + "   code: " + process.ExitCode);
        	}
	}
}