code: def data(self, xp):
      return xp.array([[1, 2, 3], [4, 5, 6]], self.dtype)
  
imports: import pickle
  import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy.cuda import driver
  from cupy.cuda import runtime
  from cupyx.scipy import sparse
label_desc: Use image node_id 2 for calling the TestDiaMatrixInit obj's underlying member method code with example usage: obj.data(xp) and returns: xp