code: def create_folds(self):
      self.dir_folds += "folds/"
      if not os.path.exists(self.dir_folds):
          os.mkdir(self.dir_folds)
  
      for n in range(self.n_splits):
          if not os.path.exists(self.dir_folds + str(n)):
              os.mkdir(self.dir_folds + str(n))
  
file_path: CaseRecommender/caserec/utils/split_database.py
imports: from sklearn.model_selection import KFold, ShuffleSplit
  import os
  from caserec.utils.process_data import ReadFile, WriteFile
label_desc: Use image node_id 2 for calling the SplitDatabase obj's underlying member method code with example usage: obj.create_folds() without return types