code: def test_shapes_scalarvalue(self):
      P = KroghInterpolator(self.xs, self.ys)
      assert_array_equal(np.shape(P(0)), ())
      assert_array_equal(np.shape(P(np.array(0))), ())
      assert_array_equal(np.shape(P([0])), (1,))
      assert_array_equal(np.shape(P([0, 1])), (2,))
  
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 11 for calling the TestKrogh obj's underlying member method code with example usage: obj.test_shapes_scalarvalue() without return types