code: def test_model_pipe(self):
      p = model_util.ModelPipe()
      p.add(lambda x: x * x, num_workers=32)
  
      input_dict = {x: x for x in range(10)}
      output_dict = p(input_dict)
  
      expected_dict = {k: v * v for k, v in six.iteritems(input_dict)}
  
      self.assertEqual(expected_dict, output_dict)
  
imports: import unittest
  import numpy
  import six
  from PIL import Image
  from io import BytesIO
  from timeout_decorator import timeout
  from studio import model_util
label_desc: Use image node_id 1 for calling the ModelPipeTest obj's underlying member method code with example usage: obj.test_model_pipe() without return types