code: def test_integer_matrix_2(self):
      # Check for integer overflows
      Q = np.array(
          [
              [-500, 500, 0, 0],
              [0, -550, 360, 190],
              [0, 630, -630, 0],
              [0, 0, 0, 0],
          ],
          dtype=np.int16,
      )
      assert_allclose(expm(Q), expm(1.0 * Q))
  
      Q = csc_matrix(Q)
      assert_allclose(expm(Q).A, expm(1.0 * Q).A)
  
imports: import math
  import numpy
  from numpy import array, eye, exp, random
  from numpy.linalg import matrix_power
  from numpy.testing import assert_allclose, assert_, assert_array_almost_equal, assert_equal, assert_array_almost_equal_nulp, suppress_warnings
  from scipy.sparse import csc_matrix, SparseEfficiencyWarning
  from scipy.sparse.construct import eye
  from scipy.sparse.linalg.matfuncs import expm, _expm, ProductOperator, MatrixPowerOperator, _onenorm_matrix_power_nnm
  from scipy.sparse.sputils import matrix
  from scipy.linalg import logm
  from scipy.special import factorial, binom
  import scipy.sparse
  import scipy.sparse.linalg
label_desc: Use image node_id 12 for calling the TestExpM obj's underlying member method code with example usage: obj.test_integer_matrix_2() without return types