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# coding=utf-8
from python.util import has_token_sequence, string_almost_equal
from server.hints import Hint, HintSequence
id = 188
group = 'introduction'
number = 2
visible = True
solution = '''\
from math import *
a = float(input("Prva kateta: "))
b = float(input("Druga kateta: "))
c = sqrt(a ** 2 + b ** 2)
print("Hipotenuza trikotnika s stranicama", a, "in", b, "je", c)
'''
hint_type = {
'plan': Hint('plan'),
'name_error': HintSequence('name_error', 4),
'unsupported_operand': HintSequence('unsupported_operand', 4),
'no_input_call' : Hint('no_input_call'),
'printing': Hint('printing'),
'math_functions': Hint('math_functions')
}
def test(python, code):
# List of inputs: (expression to eval, stdin).
test_in = [
(None, '3\n4\n'),
(None, '4\n3\n'),
(None, '12\n5\n'),
(None, '5\n12\n'),
(None, '5\n0\n'),
(None, '0\n5\n'),
(None, '1\n1\n'),
]
test_out = [
5,
5,
13,
13,
5,
5,
1.414
]
# 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
for output, correct in zip(outputs, test_out):
if string_almost_equal(output, float(correct)):
n_correct += 1
return n_correct, len(test_in)
def hint(python, code):
# run one test first to see if there are any exceptions
test_in = [(None, '3\n4\n')]
answer = python(code=code, inputs=test_in, timeout=1.0)
exc = answer[0][3]
# if have an exception!
if exc:
if 'NameError' in exc:
return [{'id':'name_error', 'args': {'message': exc}}]
if 'unsupported operand' in exc or 'TypeError' in exc:
return [{'id':'unsupported_operand', 'args': {'message': exc}}]
# show plan if student is lost
if len(code.strip()) < 5 or (not has_token_sequence(code, ['input']) and
(has_token_sequence(code, ['pi']) or
has_token_sequence(code, ['sin']) or
has_token_sequence(code, ['print']))):
return [{'id': 'plan'}]
# if input is not present in code, student needs to learn about input
if not has_token_sequence(code, ['input']) or \
not has_token_sequence(code, ['float']):
return [{'id': 'no_input_call'}]
# if tokens sqrt or ** are not in code, we have to teach them how to
# use math functions.
if (not has_token_sequence(code, ['sqrt']) or
not has_token_sequence(code, ['**'])):
return [{'id' : 'math_functions'}]
# student is not using print function
if not has_token_sequence(code, ['print']):
return [{'id' : 'printing'}]
return None
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