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# coding=utf-8
from python.util import has_token_sequence, string_almost_equal, \
string_contains_number, get_tokens, get_numbers, get_exception_desc
from server.hints import Hint, HintSequence
id = 185
group = 'while_and_if'
number = 1
visible = True
solution = '''\
vsota = 0
i = 0
while i < 5:
vsota += int(input('Cena artikla: '))
i += 1
print('Vsota:', vsota)
'''
hint_type = {
'printing': Hint('printing'),
'while_clause': Hint('while_clause'),
'reading_while': Hint('reading_while'),
'summation': Hint('summation'),
'nonumber': Hint('nonumber'),
}
def test(python, code):
# List of inputs: (expression to eval, stdin).
test_in = [
(None, '1\n1\n1\n1\n1\n'),
(None, '1\n2\n3\n4\n5\n'),
(None, '1\n2\n0\n3\n-1\n'),
(None, '5\n4\n3\n11\n7\n'),
(None, '0\n0\n0\n0\n0\n'),
]
test_out = [
5,
15,
5,
30,
0,
]
# List of outputs: (expression result, stdout, stderr, exception).
answers = python(code=code, inputs=test_in, timeout=1.0)
outputs = [ans[1] for ans in answers]
n_correct = 0
tin = None
for i, (output, correct) in enumerate(zip(outputs, test_out)):
if string_almost_equal(output, correct):
n_correct += 1
else:
tin = test_in[i][1]
tout = correct
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)}})
return passed, hints
def hint(python, code):
# run one test first to see if there are any exceptions
test_in = [(None, '1\n1\n1\n1\n1\n')]
answer = python(code=code, inputs=test_in, timeout=1.0)
exc = get_exception_desc(answer[0][3])
if exc: return exc
tokens = get_tokens(code)
# student does not have while or for: instruct him on loops
if not has_token_sequence(tokens, ['while']) and \
not has_token_sequence(tokens, ['for']):
return [{'id' : 'while_clause'}]
# student does not know how to read several values in while
if not has_token_sequence(tokens, ['input']):
return [{'id' : 'reading_while'}]
# student is not using print function
if not has_token_sequence(tokens, ['print']):
return [{'id' : 'printing'}]
# student does not know how to accumulate values (print contains 0 or 1)
if string_contains_number(answer[0][1], 0) or \
string_contains_number(answer[0][1], 1):
return [{'id' : 'summation'}]
# student does not print any values
if not get_numbers(answer[0][1]):
return [{'id' : 'nonumber'}]
return None
|
