code: def setup_method(self):
      self.rnd = np.random.RandomState(0)
  
imports: import pytest
  import numpy
  from numpy.linalg import lstsq
  from numpy.testing import assert_allclose, assert_equal, assert_
  from scipy.sparse import rand, coo_matrix
  from scipy.sparse.linalg import aslinearoperator
  from scipy.optimize import lsq_linear
  from scipy.optimize._minimize import Bounds
label_desc: Use image node_id 1 for calling the BaseMixin obj's underlying member method code with example usage: obj.setup_method() without return types