code: def __init__(self, a):
      self.a = a
      self.mean = a.mean()
      self.std = a.std()
      self.max = a.max()
      self.min = a.min()
      self.amean = np.abs(a).mean()
      self.astd = np.abs(a).std()
      self.amax = np.abs(a).max()
      self.amin = np.abs(a).min()
  
imports: from nnabla.utils import nnabla_pb2
  from six.moves import filter
  import copy
  import nnabla
  import nnabla.ext_utils
  import nnabla.functions
  import nnabla.utils.converter
  import nnabla.dtypes
  from nnabla.testing import assert_allclose
  import numpy
  import numpy
  import platform
label_desc: Use image node_id 1 to create a new ArrayStats object  with example: obj = ArrayStats(a)