code: def test_numpy_scalar_rhs(self, xp, dtype1, dtype2):
      scalar = xp.dtype(dtype2).type(10)
      return xp.append(xp.arange(20, dtype=dtype1), scalar)
  
imports: import unittest
  import pytest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 5 for calling the TestAppend obj's underlying member method code with example usage: obj.test_numpy_scalar_rhs(xp, dtype1, dtype2) and returns: xp