code: def test_noaxis(self):
      A = matrix([[1, 0], [0, 1]])
      assert_(A.sum() == matrix(2))
      assert_(A.mean() == matrix(0.5))
  
imports: import collections.abc
  import numpy
  from numpy import matrix, asmatrix, bmat
  from numpy.testing import assert_, assert_equal, assert_almost_equal, assert_array_equal, assert_array_almost_equal, assert_raises
  from numpy.linalg import matrix_power
  from numpy.matrixlib import mat
label_desc: Use image node_id 11 for calling the TestProperties obj's underlying member method code with example usage: obj.test_noaxis() without return types