code: def test_nd_array_initialize():
      shape = [2, 3, 4]
      a = nn.NdArray(shape)  # uninitialized, but is filled by zeros
  
      ref_a = np.zeros(shape, dtype=np.float32)
      assert (a.data == ref_a).all()
  
imports: import numpy
  import nnabla
  import pytest
  from nnabla.ext_utils import get_extension_context
  import nnabla.functions
label_desc: Use image node_id 6 for calling a global function with example usage: test_nd_array_initialize() without return types