class_docstr: Random crop for item sequence.
class_docstr_tok: ["Random","crop","for","item","sequence","."]
code: def __init__(self, config):
      self.ITEM_SEQ = config["ITEM_ID_FIELD"] + config["LIST_SUFFIX"]
      self.CROP_ITEM_SEQ = "Crop_" + self.ITEM_SEQ
      self.ITEM_SEQ_LEN = config["ITEM_LIST_LENGTH_FIELD"]
      self.CROP_ITEM_SEQ_LEN = self.CROP_ITEM_SEQ + self.ITEM_SEQ_LEN
      self.crop_eta = config["eta"]
      config["CROP_ITEM_SEQ"] = self.CROP_ITEM_SEQ
      config["CROP_ITEM_SEQ_LEN"] = self.CROP_ITEM_SEQ_LEN
  
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 CropItemSequence object  with example: obj = CropItemSequence(config)