code: def setUp(self):
      if self.dtype == numpy.float16:
          self.check_forward_options.update(
              {"rtol": 1e-2, "atol": 1e-2}
          )
          self.check_backward_options.update(
              {"eps": 2.0**-3, "rtol": 1e-1, "atol": 1e-1}
          )
          self.check_double_backward_options.update(
              {"eps": 2.0**-3, "rtol": 1e-1, "atol": 1e-1}
          )
      else:
          self.check_backward_options.update(
              {"eps": 2.0**-5, "rtol": 1e-4, "atol": 1e-4}
          )
          self.check_double_backward_options.update(
              {"eps": 2.0**-5, "rtol": 1e-4, "atol": 1e-4}
          )
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_logsumexp.py
imports: import unittest
  import numpy
  from chainer import functions
  from chainer import testing
  from chainer.utils import force_array
label_desc: Use image node_id 1 for calling the TestLogSumExp obj's underlying member method code with example usage: obj.setUp() without return types