class_docstr: metrics utils unittest
class_docstr_tok: ["metrics","utils","unittest"]
docstr: test ids_to_sentences function 
docstr_tok: ["test","ids_to_sentences","function"]
code: def test_ids_to_sentences(self):
      """test ids_to_sentences function"""
      config = utils.load_config(self.config_file)
      ids = [[2, 3, 1]]
      vocab_file_path = config["data"]["task"]["label_vocab"]
      sents = ids_to_sentences(ids, vocab_file_path)
      self.assertAllEqual(sents, [["I-PER", "B-LOC", "B-PER"]])
  
file_path: delta/delta/utils/postprocess/postprocess_utils_test.py
imports: import os
  from pathlib import Path
  import delta.compat
  from delta import utils
  from delta.utils.postprocess.postprocess_utils import ids_to_sentences
  from delta import PACKAGE_ROOT_DIR
label_desc: Use image node_id 3 for calling the PostprocessUtilsTest obj's underlying member method code with example usage: obj.test_ids_to_sentences() without return types