From 2d9a7b4323c8f78495ce45917cefdb502c846bbc Mon Sep 17 00:00:00 2001 From: Aleksander Sadikov Date: Mon, 29 Feb 2016 13:46:53 +0100 Subject: Hints for aunt/2 improved. Also added to text for predicate_always_false hints. --- prolog/problems/family_relations/aunt_2/common.py | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'prolog/problems/family_relations/aunt_2/common.py') diff --git a/prolog/problems/family_relations/aunt_2/common.py b/prolog/problems/family_relations/aunt_2/common.py index e545000..d408041 100644 --- a/prolog/problems/family_relations/aunt_2/common.py +++ b/prolog/problems/family_relations/aunt_2/common.py @@ -33,6 +33,7 @@ hint_type = { 'aunt_vs_mother': Hint('aunt_vs_mother'), 'x_need_not_be_parent': Hint('x_need_not_be_parent'), 'y_need_not_be_parent': Hint('y_need_not_be_parent'), + 'predicate_always_false': Hint('predicate_always_false'), } test_cases = [ @@ -69,12 +70,16 @@ def hint(code, aux_code): try: engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0) + # target predicate seems to always be false + if not prolog.engine.ask_truth(engine_id, 'aunt(_, _)'): + return [{'id': 'predicate_always_false'}] + # X and Y mixed up # warning: knowledge base dependent # independent: match on findall(X/Y, (sister(Y, P), parent(P, X)), L) if prolog.engine.ask_truth(engine_id, - 'findall(X/Y, aunt(X, Y), \ - [vanessa/sally, patricia/sally, joanne/melanie, john/vanessa, susan/patricia])'): + 'setof(X/Y, aunt(X, Y), [alessandro/daniela, alessandro/luana, jeffrey/andrew, \ + jeffrey/melanie, patricia/susan, vanessa/john, william/andrew, william/melanie])'): return [{'id': 'x_and_y_mixed_up'}] # precedence fail (AND block vs OR block) -- cgit v1.2.1