code: def test_high_derivative(self):
      P = KroghInterpolator(self.xs, self.ys)
      for i in range(len(self.xs), 2 * len(self.xs)):
          assert_almost_equal(
              P.derivative(self.test_xs, i), np.zeros(len(self.test_xs))
          )
  
imports: import warnings
  import io
  import numpy
  from numpy.testing import assert_almost_equal, assert_array_equal, assert_array_almost_equal, assert_allclose, assert_equal, assert_
  from pytest import raises
  from scipy.interpolate import KroghInterpolator, krogh_interpolate, BarycentricInterpolator, barycentric_interpolate, approximate_taylor_polynomial, CubicHermiteSpline, pchip, PchipInterpolator, pchip_interpolate, Akima1DInterpolator, CubicSpline, make_interp_spline
label_desc: Use image node_id 7 for calling the TestKrogh obj's underlying member method code with example usage: obj.test_high_derivative() without return types