code: def test_scalar_both(self, xp):
      return xp.append(10, 10)
  
imports: import unittest
  import pytest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 6 for calling the TestAppend obj's underlying member method code with example usage: obj.test_scalar_both(xp) and returns: xp