code: def test_init_from_config(self):
      config = GlowTTSConfig(num_chars=32)
      model = GlowTTS.init_from_config(config, verbose=False).to(device)
  
      config = GlowTTSConfig(num_chars=32, num_speakers=2)
      model = GlowTTS.init_from_config(config, verbose=False).to(device)
      self.assertTrue(model.num_speakers == 2)
      self.assertTrue(not hasattr(model, "emb_g"))
  
      config = GlowTTSConfig(
          num_chars=32, num_speakers=2, use_speaker_embedding=True
      )
      model = GlowTTS.init_from_config(config, verbose=False).to(device)
      self.assertTrue(model.num_speakers == 2)
      self.assertTrue(hasattr(model, "emb_g"))
  
      config = GlowTTSConfig(
          num_chars=32,
          num_speakers=2,
          use_speaker_embedding=True,
          speakers_file=os.path.join(
              get_tests_data_path(), "ljspeech", "speakers.json"
          ),
      )
      model = GlowTTS.init_from_config(config, verbose=False).to(device)
      self.assertTrue(model.num_speakers == 10)
      self.assertTrue(hasattr(model, "emb_g"))
  
      config = GlowTTSConfig(
          num_chars=32,
          use_d_vector_file=True,
          d_vector_dim=256,
          d_vector_file=os.path.join(
              get_tests_data_path(), "dummy_speakers.json"
          ),
      )
      model = GlowTTS.init_from_config(config, verbose=False).to(device)
      self.assertTrue(model.num_speakers == 1)
      self.assertTrue(not hasattr(model, "emb_g"))
      self.assertTrue(model.c_in_channels == config.d_vector_dim)
  
imports: import copy
  import os
  import unittest
  import torch
  from torch import optim
  from trainer.logging.tensorboard_logger import TensorboardLogger
  from tests import get_tests_data_path, get_tests_input_path, get_tests_output_path
  from TTS.tts.configs.glow_tts_config import GlowTTSConfig
  from TTS.tts.layers.losses import GlowTTSLoss
  from TTS.tts.models.glow_tts import GlowTTS
  from TTS.tts.utils.speakers import SpeakerManager
  from TTS.utils.audio import AudioProcessor
label_desc: Use image node_id 26 for calling the TestGlowTTS obj's underlying member method code with example usage: obj.test_init_from_config() without return types