diff options
Diffstat (limited to 'prolog/problems')
| -rw-r--r-- | prolog/problems/sorting/pivoting_4/common.py | 104 | ||||
| -rw-r--r-- | prolog/problems/sorting/pivoting_4/sl.py | 64 |
2 files changed, 162 insertions, 6 deletions
diff --git a/prolog/problems/sorting/pivoting_4/common.py b/prolog/problems/sorting/pivoting_4/common.py index 17cf270..aeb430f 100644 --- a/prolog/problems/sorting/pivoting_4/common.py +++ b/prolog/problems/sorting/pivoting_4/common.py @@ -1,11 +1,11 @@ -# coding=utf-8 - from operator import itemgetter +import socket + import prolog.engine -import server.problems +from server.hints import Hint, HintPopup id = 124 -number = 31 +number = 50 visible = False facts = None @@ -19,6 +19,22 @@ pivoting(P, [H|T], S, [H|G]) :- pivoting(P, T, S, G). ''' +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'), + 'recursive_case': Hint('recursive_case'), + 'timeout': Hint('timeout'), + '>_and_<_mixed_up': Hint('>_and_<_mixed_up'), + 'duplicates_not_considered': Hint('duplicates_not_considered'), + 'all_elements_in_either_S_or_G': Hint('all_elements_in_either_S_or_G'), + 'arbitrary_solution': Hint('arbitrary_solution'), + 'unprotected_branch': Hint('unprotected_branch'), + 'forcing_result_onto_recursion': Hint('forcing_result_onto_recursion'), + 'no_recursion_in_one_branch': Hint('no_recursion_in_one_branch'), +} + test_cases = [ ('pivoting(5, [], A, B)', [{'A': '[]', 'B': '[]'}]), @@ -50,5 +66,83 @@ 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'}] + + if prolog.engine.ask_truthTO(engine_id, '''\ + pivoting(4, [3, 5, 9, 6, 3, 7, 2], A, B), + msort(A, [5, 6, 7, 9]), + msort(B, [2, 3, 3])'''): + return [{'id': '>_and_<_mixed_up'}] + + if prolog.engine.ask_truthTO(engine_id, '''\ + pivoting(4, [2, 1, 3], [2, 1, 3], []), + pivoting(4, [3, 5, 9, 5, 2], [3 | yowza], [5 | brix]) + ; + pivoting(4, [6, 5, 7], [], [6, 5, 7]), + pivoting(4, [3, 5, 9, 5, 2], [3 | yowza], [5 | brix])'''): + return [{'id': 'no_recursion_in_one_branch'}] + + if prolog.engine.ask_truthTO(engine_id, '''\ + pivoting(4, [3, 5, 9, 6, 3, 7, 2], [3, 3, 2], [5, 9, 6, 7]), + findall(q, pivoting(4, [3, 5, 9, 6, 3, 7, 2], _, _), [q, q | _])'''): + return [{'id': 'unprotected_branch'}] + + if prolog.engine.ask_truthTO(engine_id, '''\ + pivoting(4, [3, 5, 9, 5, 2], [3, 2], [5, 9, 5]), + \+ pivoting(4, [3, 5, 4, 5, 2], _, _)'''): + return [{'id': 'duplicates_not_considered'}] + + if prolog.engine.ask_truthTO(engine_id, '''\ + pivoting(4, [5, 3], _, [5|yowza]) + ; + pivoting(4, [3, 5], [3|yowza], _)'''): + return [{'id': 'arbitrary_solution'}] + + if prolog.engine.ask_truthTO(engine_id, + 'pivoting(4, [3, 5, 9, 5, 2], S, G), (S = [] ; G = [])'): + return [{'id': 'all_elements_in_either_S_or_G'}] + + if prolog.engine.ask_truthTO(engine_id, '''\ + \+ pivoting(4, [3, 5], _, _), + (asserta(pivoting(4, [5], [3, 5], [yowza])), + pivoting(4, [3, 5], [5], [yowza]), + retract(pivoting(4, [5], [3, 5], [yowza])) + ; + asserta(pivoting(4, [3], [yowza], [5, 3])), + pivoting(4, [5, 3], [yowza], [3]), + retract(pivoting(4, [3], [yowza], [5, 3])))'''): + return [{'id': 'forcing_result_onto_recursion'}] + + # missing/failed base case + if not prolog.engine.ask_truthTO(engine_id, 'pivoting(_, [], [], [])'): + return [{'id': 'base_case'}] + + # target predicate seems to always be false + if not prolog.engine.ask_truthTO(engine_id, 'pivoting(_, _, _, _)'): + return [{'id': 'predicate_always_false'}] + + # base case works, the recursive doesn't (but it doesn't timeout) + # this may be left as the last, most generic hint + if not prolog.engine.ask_truth(engine_id, + 'pivoting(4, [2, 1, 8, 9, 3, 4, 2], [2, 1, 3, 4, 2], [8, 9])'): + return [{'id': 'recursive_case'}] + + except socket.timeout as ex: + return [{'id': 'timeout'}] + + finally: + if engine_id: + prolog.engine.destroy(engine_id) + return [] diff --git a/prolog/problems/sorting/pivoting_4/sl.py b/prolog/problems/sorting/pivoting_4/sl.py index e1aeb7a..c173dbc 100644 --- a/prolog/problems/sorting/pivoting_4/sl.py +++ b/prolog/problems/sorting/pivoting_4/sl.py @@ -10,4 +10,66 @@ description = '''\ S = [1,4,4,2], G = [5,8,6]. </pre>''' -hint = {} +hint = { + 'eq_instead_of_equ': '''\ +<p>Operator <code>==</code> je strožji od operatorja <code>=</code> v smislu, da je za slednjega dovolj, +da elementa lahko naredi enaka (unifikacija).</p> +<p>Seveda pa lahko nalogo rešiš brez obeh omenjenih operatorjev, spomni se, da lahko unifikacijo narediš +implicitno že kar v argumentih predikata (glavi stavka).</p> +''', + + 'eq_instead_of_equ_markup': '''\ +<p>Morda bi bil bolj primeren operator za unifikacijo (<code>=</code>)?</p> +''', + + 'base_case': '''\ +<p>Si pomislil na robni pogoj? Kaj je najbolj enostaven primer, ko je element v seznamu? +Do katerega elementa najlažje prideš?</p> +''', + + 'recursive_case': '''\ +<p>Robni primer deluje. Kaj pa rekurzivni, splošni, primer?</p> +''', + + 'predicate_always_false': '''\ +<p>Vse kaže, da tvoj predikat vedno vrne <code>false</code>. Si mu dal pravilno ime, si se morda pri imenu zatipkal?</p> +<p>Če je ime pravilno, se morda splača preveriti tudi, če se nisi zatipkal kje drugje, +je morda kakšna pika namesto vejice ali obratno, morda kakšna spremenljivka z malo začetnico?</p> +<p>Možno je seveda tudi, da so tvoji pogoji prestrogi ali celo nemogoči (kot bi bila npr. zahteva, +da je <code>X</code> hkrati starš in sestra od <code>Y</code> ali kaj podobno zlobnega).</p> +''', + + 'timeout': '''\ +<p>Je morda na delu potencialno neskončna rekurzija? Kako se bo ustavila?</p> +<p>Morda pa je kriv tudi manjkajoč, neustrezen ali preprosto nekompatibilen (s splošnim primerom) robni pogoj?</p> +''', + + '>_and_<_mixed_up': '''\ +<p>>_and_<_mixed_up</p> +''', + + 'duplicates_not_considered': '''\ +<p>duplicates_not_considered</p> +''', + + 'all_elements_in_either_S_or_G': '''\ +<p>all_elements_in_either_S_or_G</p> +''', + + 'arbitrary_solution': '''\ +<p>arbitrary_solution</p> +''', + + 'unprotected_branch': '''\ +<p>unprotected_branch</p> +''', + + 'forcing_result_onto_recursion': '''\ +<p>forcing_result_onto_recursion</p> +''', + + 'no_recursion_in_one_branch': '''\ +<p>no_recursion_in_one_branch</p> +''', + +} |