code: def test_bad_length(self, x_len, y_len):
      x, y = np.ones(x_len), np.ones(y_len)
      with pytest.raises(
          ValueError, match="x and y must have the same length."
      ):
          histogram2d(x, y)
  
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 7 for calling the TestHistogram2d obj's underlying member method code with example usage: obj.test_bad_length(x_len, y_len) without return types