code: def test_can_init_with_dithering(self):
      mutation = (0.5, 1)
      solver = DifferentialEvolutionSolver(
          self.quadratic, self.bounds, mutation=mutation
      )
  
      assert_equal(solver.dither, list(mutation))
  
imports: import multiprocessing
  from scipy.optimize import _differentialevolution
  from scipy.optimize._differentialevolution import DifferentialEvolutionSolver
  from scipy.optimize import differential_evolution
  import numpy
  from scipy.optimize import rosen
  from numpy.testing import assert_equal, assert_allclose, assert_almost_equal, assert_string_equal, assert_
  from pytest import raises, warns
label_desc: Use image node_id 9 for calling the TestDifferentialEvolutionSolver obj's underlying member method code with example usage: obj.test_can_init_with_dithering() without return types