code: def test_complete_graphs():
      for n in range(5, 25, 5):
          G = nx.complete_graph(n)
          assert n - 1 == approx.node_connectivity(G)
          assert n - 1 == approx.node_connectivity(G, 0, 3)
  
imports: import pytest
  import networkx
  from networkx.algorithms import approximation
label_desc: Use image node_id 3 for calling a global function with example usage: test_complete_graphs() without return types