code: def __iter__(self):
      return self.get_fixlen_iter()
  
imports: import os, sys
  import glob
  from collections import Counter, OrderedDict
  import numpy
  import torch
  from utils.vocabulary import Vocab
label_desc: Use image node_id 5 for calling the LMOrderedIterator obj's underlying member method code with example usage: obj.__iter__() and returns: self