code: def test_parallel(self):
      i_iter, s_iter = unzip(self.iterable)
  
      ints, strs = [], []
      for i, s in zip(i_iter, s_iter):
          ints.append(i)
          strs.append(s)
  
      self.assertEqual(ints, self.ints)
      self.assertEqual(strs, self.strs)
  
imports: import random
  import unittest
  from chainer import testing
  from chainercv.utils import unzip
label_desc: Use image node_id 3 for calling the TestUnzip obj's underlying member method code with example usage: obj.test_parallel() without return types