code: def test_init(self):
      name = "test_attr"
      type_ = defs.OpSchema.AttrType.STRINGS
      description = "Test attribute"
      attribute = defs.OpSchema.Attribute(name, type_, description)
  
      self.assertEqual(attribute.name, name)
      self.assertEqual(attribute.type, type_)
      self.assertEqual(attribute.description, description)
  
imports: import unittest
  from typing import Sequence
  import parameterized
  import onnx
  from onnx import defs
label_desc: Use image node_id 1 for calling the TestAttribute obj's underlying member method code with example usage: obj.test_init() without return types