code: def setup(self, size):
      self.x = np.arange(1, size + 1).astype(float)
      self.small_blocks = [np.ones([2, 2])] * (size // 2)
      self.big_blocks = [
          np.ones([size // 2, size // 2]),
          np.ones([size // 2, size // 2]),
      ]
  
imports: import math
  import numpy.linalg
  import numpy
  from numpy.testing import assert_
  from numpy.random import rand
  from .common import Benchmark, safe_import
label_desc: Use image node_id 1 for calling the SpecialMatrices obj's underlying member method code with example usage: obj.setup(size) without return types