def main():
    """
    Runs a associator from the command-line. Calls JVM start/stop automatically.
    Use -h to see all options.
    """

    parser = argparse.ArgumentParser(
        description='Executes an associator 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("-t", metavar="train", dest="train", required=True, help="training set file")
    parser.add_argument("associator", help="associator classname, e.g., weka.associations.Apriori")
    parser.add_argument("option", nargs=argparse.REMAINDER, help="additional associator 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:
        associator = Associator(classname=parsed.associator)
        if len(parsed.option) > 0:
            associator.options = parsed.option
        loader = converters.loader_for_file(parsed.train)
        data = loader.load_file(parsed.train)
        associator.build_associations(data)
        print(str(associator))
    except Exception, e:
        print(e)
    finally:
        jvm.stop()