code: def test_basic(self):
      a = get_mat(4)
      # b = a[::-1, :]
      b = np.flip(a, 0)
      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: import functools
  from unittest import expectedFailure, skipIf
  import pytest
  from pytest import raises
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
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