code: def setUp(self):
      self.shape = (3, 4)
  
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 1 for calling the TestDiaMatrixInit obj's underlying member method code with example usage: obj.setUp() without return types