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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 = 20704
number = 4
visible = True
solution = '''\
def mean(xs):
return sum(xs) / len(xs)
def std(xs):
a = mean(xs)
return math.sqrt(sum((x - a)**2 for x in xs) / len(xs))
'''
hint_type = {
'final_hint': Hint('final_hint'),
'no_comprehension': Hint('no_comprehension'),
'has_loop': Hint('has_loop')
}
def test(python, code):
func_name = 'std'
tokens = get_tokens(code)
ast = get_ast(code)
if not has_token_sequence(tokens, ['def', func_name]):
return False, [{'id' : 'no_func_name', 'args' : {'func_name' : func_name}}]
in_out = [
([183, 168, 175, 176, 192, 180], 7.43863786814),
([83, 68, 75, 76, 92, 80], 7.43863786814),
([1, 1, 1], 0),
([1], 0),
([-3, 3], 3)
]
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=code, inputs=test_in, timeout=1.0)
n_correct = 0
tin, tout = None, None
for i, (ans, to) in enumerate(zip(answers, test_out)):
corr = isinstance(ans[0], float) and almost_equal(ans[0], to, 3)
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:
if not has_comprehension(ast):
hints.append({'id': 'no_comprehension'})
elif has_loop(ast):
hints.append({'id': 'has_loop'})
else:
hints.append({'id': 'final_hint'})
return passed, hints
def hint(python, code):
tokens = get_tokens(code)
# run one test first to see if there are any exceptions
answer = python(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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