code: def test_lmdif_errmsg(self):
      # This shouldn't cause a crash on Python 3
      class SomeError(Exception):
          pass
  
      counter = [0]
  
      def func(x):
          counter[0] += 1
          if counter[0] < 3:
              return x**2 - np.array([9, 10, 11])
          else:
              raise SomeError()
  
      assert_raises(SomeError, scipy.optimize.leastsq, func, [1, 2, 3])
  
file_path: catboost/contrib/python/scipy/py3/scipy/optimize/tests/test_regression.py
imports: import numpy
  from numpy.testing import assert_almost_equal
  from pytest import raises
  import scipy.optimize
label_desc: Use image node_id 3 for calling the TestRegression obj's underlying member method code with example usage: obj.test_lmdif_errmsg() and returns: unknown