Python in Javascript in Minecraft oh my!

add.to.mod_moreEverything.js

//Start python script engine integration
var __system__;
var __file__;
var __pathJoiner__;
var engineManager;
var engine;
var execPyString;
var execPyStream;
var execPyFile;

/**
 * Sets up the python script engine.
 * Might need Java 7+
 * Currently depends on both Jython (probably needs 2.7, has to be standalone) and guava being in the classpath.
 * If you are using Forge/FML, guava is already suplied from at least 1.4 on.
 * To get a working jython.jar is a bit harder.
 * Download http://search.maven.org/remotecontent?filepath=org/python/jython-installer/2.7-b1/jython-installer-2.7-b1.jar
 * (for 2.7) and run it. Select english, agree to the agreement.
 * MAKE SURE TO SELECT STANDALONE INSTALLATION. Set the location to say a empty folder on your desktop.
 * Leave the java home alone, unless you know you are running MC with a different JRE than default (hint you probably are not)
 * Say next on the confirmation screen, wait, say next until it exits. Fin the directory you told it to install to, copy the jython.jar in there
 * to your mods folder (not coremods, not libs, etc). This SHOULD make FML insert it into your classpath, probably with MC1.4+, but I'm not sure about 1.6
 *
 * After this block, you should be able to do whatever with the Python Script engine fairly easily with execPyString, execPyStream, and execPyFile
 * Pass any string to execPyString to execute it in the python script engine
 * execPyStream is more of a helper function for execPyFile, you probably will only use it if you HAVE to have some python file out of the "msePy" directory
 * execPyFile takes an arbitrary filename and executes the file, assuming it is in config/msePy, a folder that is set as set as the python "home",
 * prepended to the python path, and had a basic registry file for jython added to it. The python "home" setting makes Jython look for that registry file there.
 */
(function ()
{
  __system__ = Packages.java.lang.System;
  __file__ = Packages.java.io.File;
  __pathJoiner__ = Packages.com.google.common.base.Joiner.on(__file__.pathSeparator).skipNulls();
  __file__(__api.__getConfigDir(), "msePy").mkdirs();
  if (!__file__(__file__(__api.__getConfigDir(), "msePy"), "registry").isFile())
  {
    //Registry file does not exist, first run
    var __regfile__ = __file__(__file__(__api.__getConfigDir(), "msePy"), "registry");
    __regfile__.createNewFile();
    var __regwriter__ = java.io.FileWriter(__regfile__, false);
    __regwriter__.write("python.security.respectJavaAccessibility = false" + __system__.lineSeparator + "python.options.caseok = false");
    __regwriter__.flush();
    __regwriter__.close();
  }
  /** I need to override this to get several things working. */
  __system__.setProperty("python.home", __file__(__api.__getConfigDir(), "msePy").toString());
  var __pythonPath__ = __system__.getProperty("python.path");
  if (!isEmpty(__pythonPath__))//I use this because typeof on null returns "object" but trying to iterate it throws so yay reuse!
  {
    //Pythonpath already has some entries somehow, prepend our msePy directory.
    var __pythonPathEntries__ = java.util.ArrayList(java.util.Arrays.asList(__pythonPath__.split(__file__.pathSeparator)));
    __pythonPathEntries__.add(0, __file__(__api.__getConfigDir(), "msePy").toString());
    __pythonPath__ = __pathJoiner__.join(__pythonPathEntries__);
  } else {
    __pythonPath__ = __file__(__api.__getConfigDir(), "msePy").toString();
  }
  __system__.setProperty("python.path", __pythonPath__);
  engineManager = new Packages.javax.script.ScriptEngineManager();
  engine = engineManager.getEngineByName("python");
  engine.put("__api__", __api);
  execPyString = function execPyString (str)//Exec's any old string, with the filename set to "UNKNOWN" to represent this.
  {
    engine.put(Packages.javax.script.ScriptEngine.FILENAME, "UNKNOWN");
    engine.exec(stream);
    engine.put(Packages.javax.script.ScriptEngine.FILENAME, null);
  };
  /**
   * Takes a class implementing Reader and executes it inside the Jython script engine.
   * @param stream the class implementing Reader
   * @param filename the name of the file that goes with the Stream or a placeholder
   * @return undefined Returns nothing, logs on error instead of throwing
  */
  execPyStream = function execPyStream (stream, filename)
  {
    try
    {
      engine.put(Packages.javax.script.ScriptEngine.FILENAME, filename.toString());
      engine.exec(stream);
    } catch (e) {log("Python stream execution failed with filename:" + ((typeof filename != "null")&&(typeof filename != "undefined")?filename.toString():"undefined"), logLevel.error)} finally {
      engine.put(Packages.javax.script.ScriptEngine.FILENAME, null);
    }
  };
  execPyFile = function execPyFile (filename)//Reads and execs a file in MSEConfigDir/msePy(or lower), which is usually .minecraft/config/msePy
  {
    var file = new __file__(__file__(__api.__getConfigDir(), "msePy"), filename);
    var reader = new Packages.java.io.InputStreamReader(new Packages.java.io.FileInputStream(file), "UTF-8");
    execPyStream(reader, file.toString());
    reader.close();
  };

}) ();