message: Use os.path.join to build ~/.onnx
diff: @@ -140,7 +140,7 @@ class Runner(object):
  rtol=1e-3)
  def _prepare_model_data(self, model_test):
  - onnx_home = os.path.expanduser(os.getenv('ONNX_HOME', '~/.onnx'))
  + onnx_home = os.path.expanduser(os.getenv('ONNX_HOME', os.path.join('~', '.onnx')))
  models_dir = os.getenv('ONNX_MODELS',
  os.path.join(onnx_home, 'models'))
  model_dir = os.path.join(models_dir, model_test.model_name)
  