code: def test_input_dimensions():
      t = np.ones((3, 3))
      assert_raises(
          ValueError, "Input array must be a 2x2 array.", mcnemar, t
      )
  
file_path: mlxtend/mlxtend/evaluate/tests/test_mcnemar_test.py
imports: import numpy
  from numpy.testing import assert_almost_equal
  from mlxtend.evaluate import mcnemar
  from mlxtend.utils import assert_raises
label_desc: Use image node_id 1 for calling a global function with example usage: test_input_dimensions() without return types