code: def update_file(self, triples, write_file):
      with open(write_file, "a") as infile:
          for t in triples:
              infile.write(
                  str(t[0])
                  + self.sep
                  + str(t[1])
                  + self.sep
                  + str(t[2])
                  + "\n"
              )
  
imports: from multiprocessing.pool import Pool
  from random import shuffle
  import numpy
  import os
  from caserec.recommenders.rating_prediction.itemknn import ItemKNN
  from caserec.recommenders.rating_prediction.matrixfactorization import MatrixFactorization
  from caserec.recommenders.rating_prediction.svdplusplus import SVDPlusPlus
  from caserec.recommenders.rating_prediction.userknn import UserKNN
  from caserec.utils.process_data import ReadFile
  from caserec.utils.extra_functions import ComputeBui
label_desc: Use image node_id 14 for calling the ECoRec obj's underlying member method code with example usage: obj.update_file(triples, write_file) without return types