code: def setUp(self):
      x_data = numpy.random.uniform(-1, 1, (3, 2, 3)).astype(
          numpy.float32
      )
      W_data = numpy.random.uniform(-1, 1, (2)).astype(numpy.float32)
      self.axis = 1
      self.x = chainer.Variable(x_data)
      self.W = chainer.Variable(W_data)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
label_desc: Use image node_id 1 for calling the TestScaleInvalidArgc obj's underlying member method code with example usage: obj.setUp() without return types