code: def test_almost_singular(self):
      A = np.array(
          [
              [
                  0.8854232310355122,
                  0.0365312146937765,
                  0.0365312146836789,
              ],
              [
                  0.3742460132129041,
                  0.0130523214078376,
                  0.0130523214077873,
              ],
              [
                  0.9680633871281361,
                  0.0319366128718639,
                  0.0319366128718388,
              ],
          ]
      )
  
      b = np.array(
          [0.0055029366538097, 0.0026677442422208, 0.0066612514782381]
      )
  
      result = lsq_linear(A, b, method=self.method)
      assert_(result.cost < 1.1e-8)
  
imports: import numpy
  from numpy.linalg import lstsq
  from numpy.testing import assert_allclose, assert_equal, assert_
  from scipy.sparse import rand
  from scipy.sparse.linalg import aslinearoperator
  from scipy.optimize import lsq_linear
  import pytest
label_desc: Use image node_id 7 for calling the BaseMixin obj's underlying member method code with example usage: obj.test_almost_singular() without return types