class_docstr: inverse the seq_item, like this
      [1,2,3,0,0,0,0] -- after inverse -->> [0,0,0,0,1,2,3]
class_docstr_tok: ["inverse","the","seq_item",",","like","this","[","1,2,3,0,0,0,0","]","--","after","inverse","--",">",">","[","0,0,0,0,1,2,3","]"]
code: def __init__(self, config):
      self.ITEM_SEQ = config["ITEM_ID_FIELD"] + config["LIST_SUFFIX"]
      self.ITEM_SEQ_LEN = config["ITEM_LIST_LENGTH_FIELD"]
      self.INVERSE_ITEM_SEQ = "Inverse_" + self.ITEM_SEQ
      config["INVERSE_ITEM_SEQ"] = self.INVERSE_ITEM_SEQ
  
imports: import math
  import numpy
  import random
  import torch
  from copy import deepcopy
  from recbole.data.interaction import Interaction, cat_interactions
label_desc: Use image node_id 1 to create a new InverseItemSequence object  with example: obj = InverseItemSequence(config)