code: def test_zetac():
      # Expected values in the following were computed using Wolfram
      # Alpha's `Zeta[x] - 1`
      x = [-2.1, 0.8, 0.9999, 9, 50, 75]
      desired = [
          -0.9972705002153750,
          -5.437538415895550,
          -10000.42279161673,
          0.002008392826082214,
          8.881784210930816e-16,
          2.646977960169853e-23,
      ]
      assert_allclose(sc.zetac(x), desired, rtol=1e-12)
  
file_path: scipy/scipy/special/tests/test_zeta.py
imports: import scipy.special
  import numpy
  from numpy.testing import assert_equal, assert_allclose
label_desc: Use image node_id 2 for calling a global function with example usage: test_zetac() without return types