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# coding=utf-8
from operator import itemgetter
import prolog.engine
import server.problems
id = 107
number = 14
visible = True
facts = None
solution = '''\
del107(X, [X|T], T).
del107(X, [Y|T], [Y|L]) :-
del107(X, T, L).
permute([], []).
permute(L, [X|P]) :-
del107(X, L, L1),
permute(L1, P).
'''
test_cases = [
('permute([], X)',
[{'X': '[]'}]),
('permute([a, i, o, e], [i, X, o, e])',
[{'X': 'a'}]),
('setof(L, permute([e, b, l], L), X)',
[{'X': '[[b, e, l], [b, l, e], [e, b, l], [e, l, b], [l, b, e], [l, e, b]]'}]),
]
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
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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