code: def setUp(self):
      self.beta = numpy.random.uniform(1, 2, ())
      self.check_forward_options = {}
      self.check_backward_options = {}
      self.check_double_backward_options = {}
      if self.dtype == numpy.float16:
          self.check_forward_options = {"atol": 5e-4, "rtol": 5e-3}
          self.check_backward_options = {"atol": 5e-3, "rtol": 5e-2}
          self.check_double_backward_options = {
              "atol": 5e-2,
              "rtol": 5e-1,
          }
  
file_path: chainer/tests/chainer_tests/functions_tests/activation_tests/test_softplus.py
imports: import numpy
  from chainer import functions
  from chainer import testing
  from chainer import utils
label_desc: Use image node_id 1 for calling the TestSoftplus obj's underlying member method code with example usage: obj.setUp() without return types