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# coding=utf-8
from operator import itemgetter
import prolog.engine
import server.problems
id = 118
number = 25
visible = False
facts = None
solution = '''\
sum([], 0).
sum([H|T], Sum) :-
sum(T, SumT),
Sum is SumT + H.
'''
test_cases = [
('sum([], X)',
[{'X': '0'}]),
('sum([8, 3, 5, 1], X)',
[{'X': '17'}]),
('sum([2, -3, 5, 0], X)',
[{'X': '4'}]),
]
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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