code: def test_matrix_ravel_order(self):
      x = matrix([[1, 2, 3], [4, 5, 6]])
      assert_equal(x.ravel(), [[1, 2, 3, 4, 5, 6]])
      assert_equal(x.ravel(order="F"), [[1, 4, 2, 5, 3, 6]])
      assert_equal(x.T.ravel(), [[1, 4, 2, 5, 3, 6]])
      assert_equal(x.T.ravel(order="A"), [[1, 2, 3, 4, 5, 6]])
  
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 6 for calling the TestShape obj's underlying member method code with example usage: obj.test_matrix_ravel_order() without return types