code: def test_choice_none_as_default():
      hp = hp_module.Choice("a", [1, 2], default=None)
      assert hp.default == 1
  
file_path: keras-tuner/keras_tuner/engine/hyperparameters/hp_types/choice_hp_test.py
imports: import numpy
  import pytest
  from keras_tuner.engine import hyperparameters
label_desc: Use image node_id 7 for calling a global function with example usage: test_choice_none_as_default() without return types