4--9 домашняя работа по формальным языкам #8
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WoWaster
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WoWaster
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May 30, 2024
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| def reachability_with_constraints( | ||
| fa: FiniteAutomaton, constraints_fa: FiniteAutomaton | ||
| ) -> dict[int, set[int]]: | ||
| intersection = intersect_automata(fa, constraints_fa, lbl=False) | ||
| res = {state: set() for state in fa.start_states} | ||
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| if intersection.is_empty(): | ||
| return res | ||
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| from_states, to_states = intersection.get_transitive_closure().nonzero() | ||
| n = len(constraints_fa) | ||
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| for from_state, to_state in zip(from_states, to_states): | ||
| if ( | ||
| from_state in intersection.start_states | ||
| and to_state in intersection.final_states | ||
| ): | ||
| res[fa.get_state_by_index(from_state // n)].add( | ||
| fa.get_state_by_index(to_state // n) | ||
| ) | ||
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| return res |
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Можете объяснить почему эта функция крайне похожа на paths_ends?
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