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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
from server.hints import Hint
id = 194
number = 2
visible = True
solution = '''\
xs = ['foo', 'bar', 'baz', 'Waldo', 'foobar']
vsebuje = False
for x in xs:
if x == 'Waldo':
vsebuje = True
print(vsebuje)
'''
hint_type = {
'no_xs': Hint('no_xs'),
'for_loop': Hint('for_loop'),
'if_clause': Hint('if_clause'),
'printing': Hint('printing'),
'print_out_for': Hint('print_out_for'),
'final_hint': Hint('final_hint')
}
def test(python, code, aux_code=''):
test_xs = [['waldo', 'foo', 'bar', 'baz'],
['foo', 'bar', 'baz', 'Waldo', 'foobar'],
['foo', 'bar', 'baz', 'Waldo'],
['Waldo', 'foo', 'bar', 'baz'],
[],
['Waldo']]
test_out = [
False,
True,
True,
True,
False,
True
]
n_correct = 0
tin = None
for xs_i, xs in enumerate(test_xs):
# change code to contain new xs instead of the one
# given by user
tcode = re.sub(r'^xs\s*=\s*\[.*?\]',
'xs = ' + str(xs),
code,
flags = re.DOTALL | re.MULTILINE)
# use python session to call tcode
answers = python(code=aux_code+tcode, inputs=[(None, None)], timeout=1.0)
output = answers[0][1]
if str(test_out[xs_i]) in output and \
str(not test_out[xs_i]) not in output:
n_correct += 1
else:
tin = test_xs[xs_i]
tout = test_out[xs_i]
passed = n_correct == len(test_xs)
hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_xs)}}]
if tin != None:
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=''):
# 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
tokens = get_tokens(code)
# if has no xs, tell him to ask for values
if not has_token_sequence(tokens, ['xs', '=', '[']):
return [{'id' : 'no_xs'}]
# 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' : 'for_loop'}]
if not has_token_sequence(tokens, ['if']):
return [{'id' : 'if_clause'}]
# student is not using print function
if not has_token_sequence(tokens, ['print']):
return [{'id' : 'printing'}]
# student is not using print function
if not has_token_sequence(tokens, ['\n', 'print']):
return [{'id' : 'print_out_for'}]
return None
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