code: def test_movmeanstd_std(self):
      a = np.array([1.0, 2.0, 4.0, 8.0])
      m = 2
  
      assert np.allclose(movmeanstd(a, m)[1], np.array([0.5, 1.0, 2.0]))
  
imports: from matrixprofile.utils import *
  import numpy
  import pytest
label_desc: Use image node_id 6 for calling the TestClass obj's underlying member method code with example usage: obj.test_movmeanstd_std() without return types