code: def main():
      
      parser = argparse.ArgumentParser(
          description='Executes a data generator from the command-line. Calls JVM start/stop automatically.')
      parser.add_argument("-j", metavar="classpath", dest="classpath", help="additional classpath, jars/directories")
      parser.add_argument("-X", metavar="heap", dest="heap", help="max heap size for jvm, e.g., 512m")
      parser.add_argument("datagenerator", help="data generator classname, e.g., "
                                                + "weka.datagenerators.classifiers.classification.LED24")
      parser.add_argument("option", nargs=argparse.REMAINDER, help="additional data generator options")
      parsed = parser.parse_args()
      jars = []
      if parsed.classpath is not None:
          jars = parsed.classpath.split(os.pathsep)
  
      jvm.start(jars, max_heap_size=parsed.heap, packages=True)
  
      logger.debug("Commandline: " + join_options(sys.argv[1:]))
  
      try:
          generator = DataGenerator(classname=parsed.datagenerator)
          if len(parsed.option) > 0:
              generator.options = parsed.option
          DataGenerator.make_data(generator, parsed.option)
      except Exception as e:
          print(e)
      finally:
          jvm.stop()
docs: Runs a datagenerator from the command-line. Calls JVM start/stop automatically.
      Use -h to see all options.