code: def test_cpu(self):
      with chainer.using_config("use_ideep", "never"):
          self._check()
  
file_path: chainer/tests/chainer_tests/functions_tests/activation_tests/test_rrelu.py
imports: import unittest
  import numpy
  import chainer
  from chainer import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 3 for calling the TestRReLUR obj's underlying member method code with example usage: obj.test_cpu() without return types