code: def setUp(self):
      self.v = chainer.Variable(numpy.zeros(1))
  
imports: import functools
  import unittest
  import numpy
  import six
  import chainer
  from chainer import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
  from chainer import variable
label_desc: Use image node_id 1 for calling the TestForgetError obj's underlying member method code with example usage: obj.setUp() without return types