code: def test_func_dump_and_load(self):
      def my_function(x, y=1, **kwargs):
          return x + y
  
      serialized = python_utils.func_dump(my_function)
      deserialized = python_utils.func_load(serialized)
      self.assertEqual(deserialized(2, y=3), 5)
  
file_path: keras/keras/utils/python_utils_test.py
imports: import base64
  import marshal
  from keras import testing
  from keras.utils import python_utils
label_desc: Use image node_id 1 for calling the PythonUtilsTest obj's underlying member method code with example usage: obj.test_func_dump_and_load() and returns: unknown