code: def setup_method(self):
      self.stepsize = 1.0
      self.displace = RandomDisplacement(stepsize=self.stepsize)
      self.N = 300000
      self.x0 = np.zeros([self.N])
  
imports: from __future__ import division, print_function, absolute_import
  import copy
  from numpy.testing import assert_almost_equal, assert_equal, assert_
  from pytest import raises
  import numpy
  from numpy import cos, sin
  from scipy.optimize import basinhopping, OptimizeResult
  from scipy.optimize._basinhopping import Storage, RandomDisplacement, Metropolis, AdaptiveStepsize
label_desc: Use image node_id 1 for calling the Test_RandomDisplacement obj's underlying member method code with example usage: obj.setup_method() without return types