code: def init(self):
      assert not self.is_initialized
      with self.sc_graph.as_default():
          self.init_sound_classifier_graph()
      self.is_initialized = True
  
file_path: turicreate/src/python/turicreate/toolkits/sound_classifier/_tf_sound_classifier.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from .._tf_model import TensorFlowModel
  import turicreate.toolkits._tf_utils
  from turicreate._deps.minimal_package import _minimal_package_import_check
label_desc: Use image node_id 4 for calling the SoundClassifierTensorFlowModel obj's underlying member method code with example usage: obj.init() without return types