code: def setUp(self):
      x = numpy.random.uniform(-1, 1, (1, 3, 7, 7)).astype(
          numpy.float32
      )
      self.x = chainer.Variable(x)
  
imports: import os
  import unittest
  import warnings
  import numpy
  import chainer
  import chainer.functions
  import chainer.links
  from chainer import testing
label_desc: Use image node_id 1 for calling the TestCaffeExport obj's underlying member method code with example usage: obj.setUp() without return types