code: def test_get_neutral():
      x = [np.ones((3, 4))]
      res = functional_utils.get_neutral(x)
      assert res[0].shape == x[0].shape
      assert res[0][0, 0] == 0
  
imports: import pytest
  import numpy
  from elephas.utils import functional_utils
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_neutral() without return types