I have been searching now for a while for a way of bridging jython into a bukkit plugin, I gave up and cooked my own and this is what I came up with. Code: package com.jakob.jython; import org.bukkit.plugin.java.JavaPlugin; import org.python.core.PyObject; import org.python.util.PythonInterpreter; import java.util.logging.Logger; public class EmbeddedJython extends JavaPlugin { private static final Logger log = Logger.getLogger("Minecraft"); private PythonInterpreter interpreter; public void onEnable() { log.info("JythonTest enabled"); this.interpreter = new PythonInterpreter(); log.info("Jython interpreter fired up and cooking on gas"); log.info("Firing exec"); this.interpreter.exec("b = [a*2 for a in xrange(4)]"); PyObject result = this.interpreter.get("b"); log.info(result.toString()); } public void onDisable() { log.info("Jython disabled"); } } You will need to build the jar with jython and the latest bukkit build. But it works