code: def test_operator_overloading():
      from pybind11_tests import Vector2, Vector, ConstructorStats
  
      v1 = Vector2(1, 2)
      v2 = Vector(3, -1)
      assert str(v1) == "[1.000000, 2.000000]"
      assert str(v2) == "[3.000000, -1.000000]"
  
      assert str(v1 + v2) == "[4.000000, 1.000000]"
      assert str(v1 - v2) == "[-2.000000, 3.000000]"
      assert str(v1 - 8) == "[-7.000000, -6.000000]"
      assert str(v1 + 8) == "[9.000000, 10.000000]"
      assert str(v1 * 8) == "[8.000000, 16.000000]"
      assert str(v1 / 8) == "[0.125000, 0.250000]"
      assert str(8 - v1) == "[7.000000, 6.000000]"
      assert str(8 + v1) == "[9.000000, 10.000000]"
      assert str(8 * v1) == "[8.000000, 16.000000]"
      assert str(8 / v1) == "[8.000000, 4.000000]"
  
      v1 += v2
      v1 *= 2
      assert str(v1) == "[8.000000, 2.000000]"
  
      cstats = ConstructorStats.get(Vector2)
      assert cstats.alive() == 2
      del v1
      assert cstats.alive() == 1
      del v2
      assert cstats.alive() == 0
      assert cstats.values() == [
          "[1.000000, 2.000000]",
          "[3.000000, -1.000000]",
          "[4.000000, 1.000000]",
          "[-2.000000, 3.000000]",
          "[-7.000000, -6.000000]",
          "[9.000000, 10.000000]",
          "[8.000000, 16.000000]",
          "[0.125000, 0.250000]",
          "[7.000000, 6.000000]",
          "[9.000000, 10.000000]",
          "[8.000000, 16.000000]",
          "[8.000000, 4.000000]",
      ]
      assert cstats.default_constructions == 0
      assert cstats.copy_constructions == 0
      assert cstats.move_constructions >= 10
      assert cstats.copy_assignments == 0
      assert cstats.move_assignments == 0
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_operator_overloading() without return types