code: def test_movmeanstd_mean(self):
      a = np.array([1.0, 2.0, 4.0, 8.0])
      m = 2
  
      assert np.allclose(movmeanstd(a, m)[0], np.array([1.5, 3.0, 6.0]))
  
imports: from matrixprofile.utils import *
  import numpy
  import pytest
label_desc: Use image node_id 5 for calling the TestClass obj's underlying member method code with example usage: obj.test_movmeanstd_mean() without return types