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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 = 187
group = 'introduction'
number = 3
visible = True
solution = '''\
from math import *
g = 9.8
kot = float(input("Vnesi kot (v stopinjah): "))
v = float(input("Vnesi hitrost (v m/s): "))
kot_rad = kot * 2 * pi / 360
razdalja = v ** 2 * sin(2 * kot_rad) / g
print("Kroglo bo odneslo", razdalja, "metrov.")
'''
hint_type = {
'plan': Hint('plan'),
'eval_expression': Hint('eval_expression'),
'sin_error': Hint('sin_error'),
'name_error': Hint('name_error'),
'unsupported_operand': Hint('unsupported_operand'),
'error': Hint('error'),
'radians': Hint('radians'),
'printing': Hint('printing'),
'betterg': Hint('betterg'),
}
def contains_negative(s):
nums = get_numbers(s)
for n in nums:
if n < 0:
return True
return False
def test(python, code):
# List of inputs: (expression to eval, stdin).
test_in = [
(None, '45\n100\n'),
(None, '44\n100\n'),
(None, '46\n100\n'),
(None, '0\n100\n'),
(None, '90\n100\n'),
(None, '32\n747\n'),
(None, '45\n10\n'),
(None, '40\n10\n'),
(None, '10\n10\n'),
(None, '80\n10\n'),
(None, '80\n20\n'),
(None, '80\n0\n')
]
test_out = [
'1020.4',
'1019.79',
'1019.79',
'0.0',
'0.0',
'51177.06',
'10.20',
'10.05',
'3.49',
'3.49',
'13.94',
'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)):
print (output, float(correct))
if string_almost_equal(output, float(correct)):
n_correct += 1
else:
tin = test_in[i][1].replace('\n', ' ')
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):
tokens = get_tokens(code)
# run one test first to see if there are any exceptions
test_in = [(None, '5\n10\n')]
answer = python(code=code, inputs=test_in, timeout=1.0)
exc = answer[0][3]
exc_hint = get_exception_desc(answer[0][3])
if exc:
if 'sin' in exc and 'NameError' in exc:
return [{'id':'sin_error', 'args': {'message': exc}}]
elif 'NameError' in exc:
return [{'id':'name_error', 'args': {'message': exc}}]
elif 'unsupported operand' in exc:
return [{'id':'unsupported_operand', 'args': {'message': exc}}]
elif 'TypeError' in exc:
return [{'id':'type_error', 'args': {'message': exc}}]
else:
return exc_hint
# if sinus is not in code, we need to teach students where they can get it
# use math functions.
if (not has_token_sequence(tokens, ['sin'])):
return [{'id' : 'eval_expression'}]
# student is not using print function
if not has_token_sequence(tokens, ['print']):
return [{'id' : 'printing'}]
# if result is negative, student did not translate to radians
if contains_negative(answer[0][1]):
return [{'id': 'radians'}]
# using g=10
if string_almost_equal(answer[0][1], 1.736, prec=2):
return [{'id': 'betterg'}]
return None
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