code: def test_load_save_get_item_vector():
      f = 3
      i = AnnoyIndex(f, "angular")
      i.add_item(0, [1.1, 2.2, 3.3])
      i.add_item(1, [4.4, 5.5, 6.6])
      i.add_item(2, [7.7, 8.8, 9.9])
  
      numpy.testing.assert_array_almost_equal(
          i.get_item_vector(0), [1.1, 2.2, 3.3]
      )
      assert i.build(10)
      assert i.save("blah.ann")
      numpy.testing.assert_array_almost_equal(
          i.get_item_vector(1), [4.4, 5.5, 6.6]
      )
      j = AnnoyIndex(f, "angular")
      assert j.load("blah.ann")
      numpy.testing.assert_array_almost_equal(
          j.get_item_vector(2), [7.7, 8.8, 9.9]
      )
  
imports: import random
  import numpy
  import pytest
  from annoy import AnnoyIndex
label_desc: Use image node_id 13 for calling a global function with example usage: test_load_save_get_item_vector() without return types