code: def test_who_local_var(self, capsys):
      # Variables declared inside an object function are not visible
      # this is true also for numpy
      x = cupy.ones(10)  # NOQA
      cupy.who()
      out, err = capsys.readouterr()
      lines = out.split("\n")
      assert len(lines) == 3
      assert lines[1] == "Upper bound on total bytes  =       0"
  
imports: import cupy
label_desc: Use image node_id 2 for calling the TestWho obj's underlying member method code with example usage: obj.test_who_local_var(capsys) without return types