code: def test_odeint(self):
      for reverse in (False, True):
          for dtype in DTYPES:
              for device in DEVICES:
                  for solver in [
                      "RK45",
                      "RK23",
                      "DOP853",
                      "Radau",
                      "BDF",
                      "LSODA",
                  ]:
                      for ode in PROBLEMS:
                          eps = 1e-3
  
                          with self.subTest(
                              reverse=reverse,
                              dtype=dtype,
                              device=device,
                              ode=ode,
                              solver=solver,
                          ):
                              f, y0, t_points, sol = construct_problem(
                                  dtype=dtype,
                                  device=device,
                                  ode=ode,
                                  reverse=reverse,
                              )
                              if torch.is_complex(y0) and solver in [
                                  "Radau",
                                  "LSODA",
                              ]:
                                  # scipy solvers don't support complex types.
                                  continue
                              y = torchdiffeq.odeint(
                                  f,
                                  y0,
                                  t_points,
                                  method="scipy_solver",
                                  options={"solver": solver},
                              )
                              self.assertTrue(sol.shape == y.shape)
                              self.assertLess(rel_error(sol, y), eps)
  
imports: from functools import partial
  import unittest
  import warnings
  import torch
  import torchdiffeq
  from problems import construct_problem, PROBLEMS, DTYPES, DEVICES, METHODS, ADAPTIVE_METHODS, FIXED_METHODS, SCIPY_METHODS
label_desc: Use image node_id 1 for calling the TestScipySolvers obj's underlying member method code with example usage: obj.test_odeint() without return types