code: def test_single_image(self):
      img = self.model.stylize(
          self.content_sf[self.content_feature][0], style=0
      )
      self.assertTrue(isinstance(img, tc.Image))
  
      # If style is a list, it should however return an SFrame
      sf = self.model.stylize(
          self.content_sf[self.content_feature][0], style=[0]
      )
      self.assertTrue(isinstance(sf, tc.SFrame))
      self.assertEqual(len(sf), 1)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import pytest
  from .None import util
  import turicreate
  import tempfile
  import numpy
  import platform
  import sys
  import os
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._internal_utils import _raise_error_if_not_sframe, _mac_ver
label_desc: Use image node_id 17 for calling the StyleTransferTest obj's underlying member method code with example usage: obj.test_single_image() without return types