code: def test_dimesions(self):
      a = self.a
      x = a[0]
      assert_equal(x.ndim, 2)
  
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
label_desc: Use image node_id 1 for calling the TestNewScalarIndexing obj's underlying member method code with example usage: obj.test_dimesions() without return types