diff options
Diffstat (limited to 'prolog/problems/lists_advanced/palindrome_1/common.py')
-rw-r--r-- | prolog/problems/lists_advanced/palindrome_1/common.py | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/prolog/problems/lists_advanced/palindrome_1/common.py b/prolog/problems/lists_advanced/palindrome_1/common.py index e9960c6..1db8481 100644 --- a/prolog/problems/lists_advanced/palindrome_1/common.py +++ b/prolog/problems/lists_advanced/palindrome_1/common.py @@ -1,8 +1,9 @@ -# coding=utf-8 - from operator import itemgetter +import socket + import prolog.engine -import server.problems +import prolog.util +from server.hints import Hint, HintPopup id = 112 number = 19 @@ -21,6 +22,14 @@ palindrome(L) :- rev112(L, L). ''' +hint_type = { + 'eq_instead_of_equ_markup': HintPopup('eq_instead_of_equ_markup'), + 'eq_instead_of_equ': Hint('eq_instead_of_equ'), + 'predicate_always_false': Hint('predicate_always_false'), + 'base_case': Hint('base_case'), + 'timeout': Hint('timeout'), +} + test_cases = [ ('palindrome([])', [{}]), @@ -50,5 +59,32 @@ def test(code, aux_code): return n_correct, len(test_cases), hints def hint(code, aux_code): - # TODO + tokens = prolog.util.tokenize(code) + + try: + engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0) + + # strict equality testing instead of simple matching + # this is usually (but not necessarily) wrong + targets = [prolog.util.Token('EQ', '==')] + marks = [(t.pos, t.pos + len(t.val)) for t in tokens if t in targets] + if marks: + return [{'id': 'eq_instead_of_equ_markup', 'start': m[0], 'end': m[1]} for m in marks] + \ + [{'id': 'eq_instead_of_equ'}] + + # missing/failed base case + if not prolog.engine.ask_truthTO(engine_id, 'palindrome([])'): + return [{'id': 'base_case'}] + + # target predicate seems to always be false + if not prolog.engine.ask_truthTO(engine_id, 'palindrome(_)'): + return [{'id': 'predicate_always_false'}] + + except socket.timeout as ex: + return [{'id': 'timeout'}] + + finally: + if engine_id: + prolog.engine.destroy(engine_id) + return [] |