code: def generate_inputs(self):
      dtype = self.dtype
      x0 = numpy.random.uniform(-1, 1, (4, 3)).astype(dtype)
      diff = numpy.random.uniform(-1, 1, (4, 3)).astype(dtype)
      diff[abs(diff) < 0.01] = 0.5
      x1 = x0 + diff
      return x0, x1
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer import utils
  from chainer.testing import attr
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the TestMeanAbsoluteError obj's underlying member method code with example usage: obj.generate_inputs() and returns: x0,  x1