old_contents: from nose.tools import assert_equal
  import uuid
  from .schema import Item
  from itertools import count
  
  
  def test_uuid():
      u, n = uuid.uuid4(), -1
      Item().insert1(dict(item=u, number=n))
      Item().insert(zip(map(uuid.uuid1, range(20)), count()))
      keys = Item().fetch('KEY')
      keys_array = Item().fetch('KEY_ARRAY')
      number = (Item() & {'item': u}).fetch1('number')
      assert_equal(number, n)
  
new_contents: from nose.tools import assert_equal
  import uuid
  from .schema import Item
  from itertools import count
  
  
  def test_uuid():
      u, n = uuid.uuid4(), -1
      Item().insert1(dict(item=u, number=n))
      Item().insert(zip(map(uuid.uuid1, range(20)), count()))
      keys, key_array = Item().fetch('KEY', 'KEY_ARRAY')
      assert_equal(keys[0]['item'], key_array['item'][0])
      number = (Item() & {'item': u}).fetch1('number')
      assert_equal(number, n)
      item = (Item & {'number': n}).fetch1('item')
      assert_equal(u, item)
  
subject: improve uuid test