code: def test_no_scipy_zeta():
      zeta2 = 1.6449340668482264
      assert (
          abs(
              zeta2
              - nx.generators.community._hurwitz_zeta(2, 1, 0.0001)
          )
          < 0.01
      )
  
imports: import pytest
  import networkx
label_desc: Use image node_id 21 for calling a global function with example usage: test_no_scipy_zeta() without return types