code: def data_available(dataset_name=None):
      
      dr = data_resources[dataset_name]
      if 'dirs' in dr:
          for dirs, files in zip(dr['dirs'], dr['files']):
              for dir, file in zip(dirs, files):
                  if not os.path.exists(os.path.join(data_path, dataset_name, dir, file)):
                      return False
      else:
          for file_list in dr['files']:
              for file in file_list:
                  if not os.path.exists(os.path.join(data_path, dataset_name, file)):
                      return False
      return True
docs: Check if the data set is available on the local machine already.