code: def test_array_newton_zero_der_failures(self):
      # test derivative zero warning
      assert_warns(
          RuntimeWarning,
          zeros.newton,
          lambda y: y**2 - 2,
          [0.0, 0.0],
          lambda y: 2 * y,
      )
      # test failures and zero_der
      with pytest.warns(RuntimeWarning):
          results = zeros.newton(
              lambda y: y**2 - 2,
              [0.0, 0.0],
              lambda y: 2 * y,
              full_output=True,
          )
          assert_allclose(results.root, 0)
          assert results.zero_der.all()
          assert not results.converged.any()
  
imports: from __future__ import division, print_function, absolute_import
  import pytest
  from math import sqrt, exp, sin, cos
  from numpy.testing import assert_warns, assert_, assert_allclose, assert_equal, assert_array_equal
  import numpy
  from numpy import finfo, power, nan, isclose
  from scipy.optimize import zeros, newton, root_scalar
  from scipy._lib._util import getargspec_no_self
  from scipy.optimize._tstutils import get_tests, functions, fstrings
  from scipy._lib._numpy_compat import suppress_warnings
label_desc: Use image node_id 27 for calling the TestBasic obj's underlying member method code with example usage: obj.test_array_newton_zero_der_failures() without return types