code: def setUp(self):
      self.dtype = numpy.float32
      self.w = 10
      self.h = 8
      shape = (2, 3, self.h, self.w)
      self.img = numpy.random.uniform(-1, 1, shape).astype(self.dtype)
  
imports: import unittest
  import numpy
  from six import moves
  from chainer.backends import cuda
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import conv
label_desc: Use image node_id 1 for calling the TestIm2Col obj's underlying member method code with example usage: obj.setUp() without return types