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import re
from python.util import has_token_sequence, string_almost_equal, \
string_contains_number, get_tokens, get_numbers, get_exception_desc, \
all_tokens, has_comprehension, has_loop, almost_equal, get_ast
from server.hints import Hint
id = 20809
number = 9
visible = True
solution = '''\
def find_sum(xs, gs):
if gs < 0:
return False
if gs == 0:
return True
if not xs:
return False
return find_sum(xs[1:], gs-xs[0]) or find_sum(xs[1:], gs)
'''
hint_type = {
'final_hint': Hint('final_hint')
}
def test(python, code, aux_code=''):
func_name = 'find_sum'
tokens = get_tokens(code)
if not has_token_sequence(tokens, ['def', func_name]):
return False, [{'id' : 'no_func_name', 'args' : {'func_name' : func_name}}]
in_out = [
(([2,7,3,1,4], 10), True),
(([2,3,2,4], 10), False),
(([], 10), False),
(([1,2,3], 2), True),
(([1,2,3], 7), False),
(([2,7,3,1,4], 9), True),
(([2,7,3,2,4], 17), False),
]
test_in = [('{0}{1}'.format(func_name, str(l[0])), None)
for l in in_out]
test_out = [l[1] for l in in_out]
answers = python(code=aux_code+code, inputs=test_in, timeout=1.0)
n_correct = 0
tin, tout = None, None
for i, (ans, to) in enumerate(zip(answers, test_out)):
res = ans[0]
corr = res == to
n_correct += corr
if not corr:
tin = test_in[i][0]
tout = to
passed = n_correct == len(test_in)
hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_in)}}]
if tin:
hints.append({'id': 'problematic_test_case', 'args': {'testin': str(tin), 'testout': str(tout)}})
if passed:
hints.append({'id': 'final_hint'})
return passed, hints
def hint(python, code, aux_code=''):
tokens = get_tokens(code)
# run one test first to see if there are any exceptions
answer = python(code=aux_code+code, inputs=[(None, None)], timeout=1.0)
exc = get_exception_desc(answer[0][3])
if exc: return exc
return None
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