class_docstr: Test running model for a scalar ODE with 1 parameter
code: def test_unexpected_return_type_dict(self):
      with pytest.raises(
          TypeError,
          match="Unexpected type, <class 'dict'>, returned by ode_func.",
      ):
  
          def system_dict(y, t, p):
              return {"rhs": np.exp(-t) - p[0] * y[0]}
  
          DifferentialEquation(
              func=system_dict,
              t0=0,
              times=self.times,
              n_states=4,
              n_theta=1,
          )
  
imports: import warnings
  import numpy
  import pytensor
  import pytensor.tensor
  import pytest
  from scipy.stats import norm
  import pymc
  from pymc.ode import DifferentialEquation
  from pymc.testing import fast_unstable_sampling_mode
label_desc: Use image node_id 12 for calling the TestErrors obj's underlying member method code with example usage: obj.test_unexpected_return_type_dict() and returns: dict