code: def setUp(self):
      self.skip_backward_test = True
      self.skip_double_backward_test = True
  
      if self.dtype == numpy.float16:
          self.check_forward_options.update(
              {"atol": 1e-4, "rtol": 1e-3}
          )
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer.utils import force_array
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestBinaryAccuracy obj's underlying member method code with example usage: obj.setUp() without return types