def deepcopy(obj):
    """
    Creates a deep copy of the JavaObject (or derived class) or JB_Object.

    :param obj: the object to create a copy of
    :type obj: object
    :return: the copy, None if failed to copy
    :rtype: object
    """
    if isinstance(obj, JavaObject):
        wrapped = True
        jobject = obj.jobject
    else:
        wrapped = False
        jobject = obj
    try:
        serialized = javabridge.make_instance("weka/core/SerializedObject", "(Ljava/lang/Object;)V", jobject)
        jcopy = javabridge.call(serialized, "getObject", "()Ljava/lang/Object;")
        if wrapped:
            jcopy = obj.__class__(jobject=jcopy)
        return jcopy
    except JavaException as e:
        print("Failed to create copy of " + classes.get_classname(obj) + ": " + str(e))
        return None
Creates a deep copy of the JavaObject (or derived class) or JB_Object.

    :param obj: the object to create a copy of
    :type obj: object
    :return: the copy, None if failed to copy
    :rtype: object