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# coding=utf-8
from operator import itemgetter
import prolog.engine
import server.problems
id = 134
number = 41
visible = True
facts = None
solution = '''\
subset134([], []).
subset134([H|T], [H|T1]) :-
subset134(T, T1).
subset134([_|T], T1) :-
subset134(T, T1).
powerset(Set, PowerSet) :-
findall(S, subset134(Set, S), PowerSet).
'''
test_cases = [
('powerset([], X)',
[{'X': '[[]]'}]),
('powerset([1, 2], A), length(A, 4), lists:flatten(A, Y), msort(Y, X)',
[{'X': '[1, 1, 2, 2]'}]),
('powerset([1, 2, 3], A), length(A, 8), lists:flatten(A, Y), msort(Y, X)',
[{'X': '[1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3]'}]),
]
def test(program, solved_problems):
code = (program + '\n' +
server.problems.solutions_for_problems('prolog', solved_problems))
n_correct = 0
engine_id = None
try:
engine_id, output = prolog.engine.create(code=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)
passed = n_correct == len(test_cases)
hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
return passed, hints
def hint(program, solved_problems):
# TODO
return []
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