code: def test_empty_iterable():
      condition = lambda x: x > 0
      with pytest.raises(ValueError):
          index_satisfying([], condition)
  
imports: from itertools import combinations
  import pytest
  from networkx import DiGraph
  from networkx.algorithms.tournament import hamiltonian_path, index_satisfying, is_reachable, is_strongly_connected, is_tournament, random_tournament, score_sequence, tournament_matrix
label_desc: Use image node_id 2 for calling a global function with example usage: test_empty_iterable() without return types