code: def count_close(x, y, atol=1e-4):
      assert x.shape == y.shape
      return int(sum(abs(x - y) / abs(x) < atol))
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  import chainer.functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import backend
  from chainer.testing import condition
label_desc: Use image node_id 5 for calling a global function with example usage: count_close(x, y, atol) and returns: int