code: def test_spherical_in_at_zero(self):
      # https://dlmf.nist.gov/10.52.E1
      # But note that n = 0 is a special case: i0 = sinh(x)/x -> 1
      n = np.array([0, 1, 2, 5, 10, 100])
      x = 0
      assert_allclose(spherical_in(n, x), np.array([1, 0, 0, 0, 0, 0]))
  
imports: import numpy
  from numpy.testing import assert_almost_equal, assert_allclose, assert_array_almost_equal, suppress_warnings
  import pytest
  from numpy import sin, cos, sinh, cosh, exp, inf, nan, r_, pi
  from scipy.special import spherical_jn, spherical_yn, spherical_in, spherical_kn
  from scipy.integrate import quad
label_desc: Use image node_id 6 for calling the TestSphericalIn obj's underlying member method code with example usage: obj.test_spherical_in_at_zero() without return types