code: def test_basic(self):
      a = get_mat(4)
      b = a[::-1, :]
      assert_equal(flipud(a), b)
      a = [[0, 1, 2], [3, 4, 5]]
      b = [[3, 4, 5], [0, 1, 2]]
      assert_equal(flipud(a), b)
  
imports: from numpy.testing import assert_equal, assert_array_equal, assert_array_max_ulp, assert_array_almost_equal, assert_raises, assert_
  from numpy import arange, add, fliplr, flipud, zeros, ones, eye, array, diag, histogram2d, tri, mask_indices, triu_indices, triu_indices_from, tril_indices, tril_indices_from, vander
  import numpy
  import pytest
label_desc: Use image node_id 1 for calling the TestFlipud obj's underlying member method code with example usage: obj.test_basic() without return types