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authorAleksander Sadikov <aleksander.sadikov@fri.uni-lj.si>2016-02-29 00:27:21 +0100
committerAleksander Sadikov <aleksander.sadikov@fri.uni-lj.si>2016-02-29 00:27:21 +0100
commit90dbc3fa624d62e093bea7b90a72a28ad216f7bd (patch)
treeebefd97dcb67bd3e106a38a4c78c1a4337d17dfd /prolog/problems/family_relations/sister_2
parent0891683712b8f4206a83c200e6ad3df283a64a75 (diff)
Additional improvements to hints for mother, father, grandparent, sister, and brother problems.
Diffstat (limited to 'prolog/problems/family_relations/sister_2')
-rw-r--r--prolog/problems/family_relations/sister_2/common.py8
1 files changed, 4 insertions, 4 deletions
diff --git a/prolog/problems/family_relations/sister_2/common.py b/prolog/problems/family_relations/sister_2/common.py
index 1234985..2be3ab3 100644
--- a/prolog/problems/family_relations/sister_2/common.py
+++ b/prolog/problems/family_relations/sister_2/common.py
@@ -91,6 +91,10 @@ 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, 'sister(_, _)'):
+ return [{'id': 'predicate_always_false'}]
+
# X must be female
if prolog.engine.ask_truth(engine_id, 'male(X), sister(X, _)'):
return [{'id': 'x_must_be_female'}]
@@ -112,10 +116,6 @@ def hint(code, aux_code):
if prolog.util.Token('NEQU', '\=') in tokens or prolog.util.Token('NEQA', '=\=') in tokens:
return [{'id': 'neq+_instead_of_neq'}]
- # target predicate seems to always be false
- if prolog.engine.ask_one(engine_id, 'sister(_, _)') == 'false':
- return [{'id': 'predicate_always_false'}]
-
# X and Y must be different
# this is the last code-specific hint (when everything else doesn't trigger anymore)
if prolog.util.Token('NEQ', '\==') not in tokens and prolog.engine.ask_truth(engine_id,