code: def _get_graph_input_names(onnx_model):
      return list(
          _get_input_names(onnx_model)
          - get_initializer_names(onnx_model)
      )
  
imports: import glob
  import os
  import unittest
  import chainer
  import numpy
  import onnx
  import pytest
  from onnx_chainer.testing.get_test_data_set import gen_test_data_set
label_desc: Use image node_id 5 for calling a global function with example usage: _get_graph_input_names(onnx_model) and returns: list