code: def test_L2(inceptionv1):
      objective = objectives.L2()  # on input by default
      assert_gradient_ascent(objective, inceptionv1)
  
imports: from __future__ import absolute_import, division, print_function
  import pytest
  import tensorflow
  import numpy
  from lucid.optvis import objectives, param, render, transform
  from lucid.modelzoo.vision_models import InceptionV1
label_desc: Use image node_id 12 for calling a global function with example usage: test_L2(inceptionv1) without return types