diff options
Diffstat (limited to 'prolog/problems/family_relations/father_2/common.py')
| -rw-r--r-- | prolog/problems/family_relations/father_2/common.py | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/prolog/problems/family_relations/father_2/common.py b/prolog/problems/family_relations/father_2/common.py index 0c65a83..11f0742 100644 --- a/prolog/problems/family_relations/father_2/common.py +++ b/prolog/problems/family_relations/father_2/common.py @@ -25,6 +25,7 @@ hint_type = { 'x_must_be_parent': Hint('x_must_be_parent'), 'y_can_be_of_any_gender': Hint('y_can_be_of_any_gender'), 'y_need_not_be_parent': Hint('y_need_not_be_parent'), + 'predicate_always_false': Hint('predicate_always_false'), } test_cases = [ @@ -92,15 +93,19 @@ def hint(code, aux_code): return [{'id': 'x_must_be_parent'}] # Y can be of any gender, incl. female - if prolog.engine.ask_one(engine_id, - 'father(_, Y), female(Y)') == 'false': + if prolog.engine.ask_truth(engine_id, 'father(_, Y)') and \ + prolog.engine.ask_one(engine_id, 'father(_, Y), female(Y)') == 'false': return [{'id': 'y_can_be_of_any_gender'}] # Y does not necessarily need to be a parent - if prolog.engine.ask_one(engine_id, - 'father(_, Y), \+ parent(Y, _)') == 'false': + if prolog.engine.ask_truth(engine_id, 'father(_, Y)') and \ + prolog.engine.ask_one(engine_id, 'father(_, Y), \+ parent(Y, _)') == 'false': return [{'id': 'y_need_not_be_parent'}] + # target predicate seems to always be false + if prolog.engine.ask_one(engine_id, 'father(_, _)') == 'false': + return [{'id': 'predicate_always_false'}] + except socket.timeout as ex: pass |