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# coding=utf-8
from operator import itemgetter
import prolog.engine
import server.problems
id = 116
number = 23
visible = False
facts = None
solution = '''\
evenlen([]).
evenlen([_,_|T]) :-
evenlen(T).
oddlen([_]).
oddlen([_,_|T]) :-
oddlen(T).
'''
test_cases = [
('evenlen([])',
[{}]),
('evenlen([r, w, t, q])',
[{}]),
('\+ evenlen([r, w, t, q, l])',
[{}]),
('\+ oddlen([r, w, t, q])',
[{}]),
('oddlen([r, w, t, q, l])',
[{}]),
]
def test(code, aux_code):
n_correct = 0
engine_id = None
try:
engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
if engine_id is not None and 'error' not in map(itemgetter(0), output):
# Engine successfully created, and no syntax error in program.
for query, answers in test_cases:
if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0):
n_correct += 1
except socket.timeout:
pass
finally:
if engine_id:
prolog.engine.destroy(engine_id)
hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
return n_correct, len(test_cases), hints
def hint(code, aux_code):
# TODO
return []
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