code: def test_forward_call_with_file_or_object_dict_type(self):
      input_text = "Hello world."
      expected_output = [char for char in "həˈɫoʊ ˈwɝɫd."]
  
      phoneme_dict = {
          "HELLO": ["həˈɫoʊ"],
          "WORLD": ["ˈwɝɫd"],
          "LEAD": ["ˈlɛd", "ˈlid"],
          "NVIDIA": ["ɛnˈvɪdiə"],
      }
  
      g2p_file = self._create_g2p()
      g2p_dict = self._create_g2p(phoneme_dict=phoneme_dict)
  
      phonemes_file = g2p_file(input_text)
      phonemes_dict = g2p_dict(input_text)
      assert phonemes_dict == expected_output
      assert phonemes_file == phonemes_dict
  
imports: import os
  import unicodedata
  import pytest
  from nemo.collections.tts.g2p.models.i18n_ipa import IpaG2p
  from nemo.collections.tts.g2p.utils import GRAPHEME_CASE_LOWER, GRAPHEME_CASE_MIXED, GRAPHEME_CASE_UPPER
label_desc: Use image node_id 6 for calling the TestIpaG2p obj's underlying member method code with example usage: obj.test_forward_call_with_file_or_object_dict_type() without return types