code: def setUp(self):
      self.x = chainer.Variable(
          numpy.ones((10, 5), dtype=numpy.float32)
      )
      self.layer = L.Linear(5, 20)
  
imports: import copy
  import os
  import unittest
  import numpy
  import pytest
  import chainer
  from chainer.backends import _cpu
  from chainer.link_hooks.spectral_normalization import SpectralNormalization
  import chainer.links
  from chainer import serializers
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing.backend import BackendConfig
  from chainer import utils
label_desc: Use image node_id 1 for calling the TestExceptions obj's underlying member method code with example usage: obj.setUp() without return types