def test_grade_dag():
for submission, expected, expected_ed in zip(problem_1_submissions, problem_1_expected, problem_1_expected_ed):
assert grade_dag(submission, problem_1_dag, problem_1_groups) == (expected, 10)
assert lcs_partial_credit(submission, problem_1_dag, {}) == expected_ed
for submission, expected, expected_ed_no_groups, expected_ed_groups in zip(problem_2_submissions, problem_2_expected, problem_2_expected_ed_no_groups, problem_2_expected_ed_groups):
assert grade_dag(submission, problem_2_dag, problem_2_groups) == (expected, 7)
assert lcs_partial_credit(submission, problem_2_dag_no_groups, {}) == expected_ed_no_groups
assert lcs_partial_credit(submission, problem_2_dag, problem_2_groups) == expected_ed_groups
def test_grade_dag():
for submission, expected, expected_ed in zip(problem_1_submissions,
problem_1_expected,
problem_1_expected_ed):
assert grade_dag(submission, problem_1_dag,
problem_1_groups) == expected
assert lcs_partial_credit(submission, problem_1_dag, {}) == expected_ed
count = 0
for submission, expected, expected_ed_no_groups, expected_ed_groups in zip(
problem_2_submissions, problem_2_expected,
problem_2_expected_ed_no_groups, problem_2_expected_ed_groups):
print(count)
count += 1
assert grade_dag(submission, problem_2_dag,
problem_2_groups) == expected
assert lcs_partial_credit(submission, problem_2_dag,
{}) == expected_ed_no_groups
assert lcs_partial_credit(submission, problem_2_dag,
problem_2_groups) == expected_ed_groups
def grade(element_html, data):
element = lxml.html.fragment_fromstring(element_html)
answer_name = pl.get_string_attrib(element, 'answers-name')
student_answer = data['submitted_answers'][answer_name]
grading_mode = pl.get_string_attrib(element, 'grading-method',
GRADING_METHOD_DEFAULT)
check_indentation = pl.get_boolean_attrib(element, 'indentation',
INDENTION_DEFAULT)
feedback_type = pl.get_string_attrib(element, 'feedback', FEEDBACK_DEFAULT)
answer_weight = pl.get_integer_attrib(element, 'weight', WEIGHT_DEFAULT)
true_answer_list = data['correct_answers'][answer_name]
indent_score = 0
final_score = 0
feedback = ''
first_wrong = -1
if len(student_answer) == 0:
data['format_errors'][answer_name] = 'Your submitted answer was empty.'
return
if grading_mode == 'unordered':
true_answer_list = filter_multiple_from_array(
true_answer_list, ['uuid', 'indent', 'inner_html'])
correct_selections = [
opt for opt in student_answer if opt in true_answer_list
]
incorrect_selections = [
opt for opt in student_answer if opt not in true_answer_list
]
final_score = float(
(len(correct_selections) - len(incorrect_selections)) /
len(true_answer_list))
final_score = max(0.0, final_score) # scores cannot be below 0
elif grading_mode == 'ordered':
student_answer = [ans['inner_html'] for ans in student_answer]
true_answer = [ans['inner_html'] for ans in true_answer_list]
final_score = 1 if student_answer == true_answer else 0
elif grading_mode == 'ranking':
ranking = filter_multiple_from_array(
data['submitted_answers'][answer_name], ['ranking'])
ranking = list(map(lambda x: x['ranking'], ranking))
correctness = 1 + ranking.count(0)
partial_credit = 0
if len(ranking) != 0 and len(ranking) == len(true_answer_list):
ranking = list(filter(lambda x: x != 0, ranking))
for x in range(0, len(ranking) - 1):
if int(ranking[x]) == int(
ranking[x + 1]) or int(ranking[x]) + 1 == int(
ranking[x + 1]):
correctness += 1
else:
correctness = 0
correctness = max(correctness, partial_credit)
final_score = float(correctness / len(true_answer_list))
elif grading_mode == 'dag':
order = [ans['tag'] for ans in student_answer]
depends_graph = {
ans['tag']: ans['depends']
for ans in true_answer_list
}
group_belonging = {
ans['tag']: ans['group']
for ans in true_answer_list
}
correctness, first_wrong = grade_dag(order, depends_graph,
group_belonging)
if correctness == len(depends_graph.keys()):
final_score = 1
elif correctness < len(depends_graph.keys()):
final_score = 0 # TODO figure out a partial credit scheme
if feedback_type == 'none':
feedback = ''
elif feedback_type == 'first-wrong':
if first_wrong == -1:
feedback = 'Your answer is correct so far, but it is incomplete.'
else:
feedback = r"""Your answer is incorrect starting at <span style="color:red;">block number """ + str(first_wrong + 1) + \
r"""</span>. The problem is most likely one of the following:
<ul><li> This block is not a part of the correct solution </li>
<li> This block is not adequately supported by previous block </li>
<li> You have attempted to start a new section of the answer without finishing the previous section </li></ul>"""
if check_indentation:
student_answer_indent = filter_multiple_from_array(
data['submitted_answers'][answer_name], ['indent'])
student_answer_indent = list(
map(lambda x: x['indent'], student_answer_indent))
true_answer_indent = filter_multiple_from_array(
data['correct_answers'][answer_name], ['indent'])
true_answer_indent = list(
map(lambda x: x['indent'], true_answer_indent))
for i, indent in enumerate(student_answer_indent):
if true_answer_indent[i] == '-1' or int(
indent) == true_answer_indent[i]:
indent_score += 1
final_score = final_score * (indent_score / len(true_answer_indent))
data['partial_scores'][answer_name] = {
'score': round(final_score, 2),
'feedback': feedback,
'weight': answer_weight,
'first_wrong': first_wrong
}
def grade(element_html, data):
element = lxml.html.fragment_fromstring(element_html)
answer_name = pl.get_string_attrib(element, 'answers-name')
student_answer = data['submitted_answers'][answer_name]
grading_mode = pl.get_string_attrib(element, 'grading-method',
GRADING_METHOD_DEFAULT)
check_indentation = pl.get_boolean_attrib(element, 'indentation',
INDENTION_DEFAULT)
feedback_type = pl.get_string_attrib(element, 'feedback', FEEDBACK_DEFAULT)
answer_weight = pl.get_integer_attrib(element, 'weight', WEIGHT_DEFAULT)
partial_credit_type = pl.get_string_attrib(element, 'partial-credit',
'lcs')
true_answer_list = data['correct_answers'][answer_name]
final_score = 0
feedback = ''
first_wrong = -1
if len(student_answer) == 0:
data['format_errors'][answer_name] = 'Your submitted answer was empty.'
return
if check_indentation:
indentations = {ans['uuid']: ans['indent'] for ans in true_answer_list}
for ans in student_answer:
if ans['indent'] != indentations.get(ans['uuid']):
if 'tag' in ans:
ans['tag'] = None
else:
ans['inner_html'] = None
if grading_mode == 'unordered':
true_answer_list = filter_multiple_from_array(
true_answer_list, ['uuid', 'indent', 'inner_html'])
correct_selections = [
opt for opt in student_answer if opt in true_answer_list
]
incorrect_selections = [
opt for opt in student_answer if opt not in true_answer_list
]
final_score = float(
(len(correct_selections) - len(incorrect_selections)) /
len(true_answer_list))
final_score = max(0.0, final_score) # scores cannot be below 0
elif grading_mode == 'ordered':
student_answer = [ans['inner_html'] for ans in student_answer]
true_answer = [ans['inner_html'] for ans in true_answer_list]
final_score = 1 if student_answer == true_answer else 0
elif grading_mode in ['ranking', 'dag']:
submission = [ans['tag'] for ans in student_answer]
depends_graph = {}
group_belonging = {}
if grading_mode == 'ranking':
true_answer_list = sorted(true_answer_list,
key=lambda x: int(x['ranking']))
true_answer = [answer['tag'] for answer in true_answer_list]
tag_to_rank = {
answer['tag']: answer['ranking']
for answer in true_answer_list
}
lines_of_rank = {
rank: [tag for tag in tag_to_rank if tag_to_rank[tag] == rank]
for rank in set(tag_to_rank.values())
}
cur_rank_depends = []
prev_rank = None
for tag in true_answer:
ranking = tag_to_rank[tag]
if prev_rank is not None and ranking != prev_rank:
cur_rank_depends = lines_of_rank[prev_rank]
depends_graph[tag] = cur_rank_depends
prev_rank = ranking
elif grading_mode == 'dag':
depends_graph, group_belonging = extract_dag(true_answer_list)
num_initial_correct, true_answer_length = grade_dag(
submission, depends_graph, group_belonging)
first_wrong = -1 if num_initial_correct == len(
submission) else num_initial_correct
if partial_credit_type == 'none':
if num_initial_correct == true_answer_length:
final_score = 1
elif num_initial_correct < true_answer_length:
final_score = 0
elif partial_credit_type == 'lcs':
edit_distance = lcs_partial_credit(submission, depends_graph,
group_belonging)
final_score = max(
0,
float(true_answer_length - edit_distance) / true_answer_length)
if final_score < 1:
if feedback_type == 'none':
feedback = ''
elif feedback_type == 'first-wrong':
if first_wrong == -1:
feedback = FIRST_WRONG_FEEDBACK['incomplete']
else:
feedback = FIRST_WRONG_FEEDBACK['wrong-at-block'].format(
str(first_wrong + 1))
has_block_groups = group_belonging != {} and set(
group_belonging.values()) != {None}
if check_indentation:
feedback += FIRST_WRONG_FEEDBACK['indentation']
if has_block_groups:
feedback += FIRST_WRONG_FEEDBACK['block-group']
feedback += '</ul>'
data['partial_scores'][answer_name] = {
'score': round(final_score, 2),
'feedback': feedback,
'weight': answer_weight,
'first_wrong': first_wrong
}
def grade(element_html, data):
element = lxml.html.fragment_fromstring(element_html)
answer_name = pl.get_string_attrib(element, 'answers-name')
student_answer = data['submitted_answers'][answer_name]
grading_mode = pl.get_string_attrib(element, 'grading-method',
GRADING_METHOD_DEFAULT)
check_indentation = pl.get_boolean_attrib(element, 'indentation',
INDENTION_DEFAULT)
feedback_type = pl.get_string_attrib(element, 'feedback', FEEDBACK_DEFAULT)
answer_weight = pl.get_integer_attrib(element, 'weight', WEIGHT_DEFAULT)
true_answer_list = data['correct_answers'][answer_name]
indent_score = 0
final_score = 0
feedback = ''
first_wrong = -1
if len(student_answer) == 0:
data['format_errors'][answer_name] = 'Your submitted answer was empty.'
return
if grading_mode == 'unordered':
true_answer_list = filter_multiple_from_array(
true_answer_list, ['uuid', 'indent', 'inner_html'])
correct_selections = [
opt for opt in student_answer if opt in true_answer_list
]
incorrect_selections = [
opt for opt in student_answer if opt not in true_answer_list
]
final_score = float(
(len(correct_selections) - len(incorrect_selections)) /
len(true_answer_list))
final_score = max(0.0, final_score) # scores cannot be below 0
elif grading_mode == 'ordered':
student_answer = [ans['inner_html'] for ans in student_answer]
true_answer = [ans['inner_html'] for ans in true_answer_list]
final_score = 1 if student_answer == true_answer else 0
elif grading_mode == 'ranking':
ranking = filter_multiple_from_array(
data['submitted_answers'][answer_name], ['ranking'])
ranking = list(map(lambda x: x['ranking'], ranking))
correctness = 1 + ranking.count(0)
partial_credit = 0
if len(ranking) != 0 and len(ranking) == len(true_answer_list):
ranking = list(filter(lambda x: x != 0, ranking))
for x in range(0, len(ranking) - 1):
if int(ranking[x]) == int(
ranking[x + 1]) or int(ranking[x]) + 1 == int(
ranking[x + 1]):
correctness += 1
else:
correctness = 0
correctness = max(correctness, partial_credit)
final_score = float(correctness / len(true_answer_list))
elif grading_mode == 'dag':
order = [ans['tag'] for ans in student_answer]
depends_graph = {
ans['tag']: ans['depends']
for ans in true_answer_list
}
group_belonging = {
ans['tag']: ans['group']
for ans in true_answer_list
}
correctness, first_wrong = grade_dag(order, depends_graph,
group_belonging)
if correctness == len(depends_graph.keys()):
final_score = 1
elif correctness < len(depends_graph.keys()):
final_score = 0 # TODO figure out a partial credit scheme
if feedback_type == 'none':
feedback = ''
elif feedback_type == 'first-wrong':
if first_wrong == -1:
feedback = DAG_FIRST_WRONG_FEEDBACK['incomplete']
else:
feedback = DAG_FIRST_WRONG_FEEDBACK[
'wrong-at-block'].format(str(first_wrong + 1))
if check_indentation:
student_answer_indent = filter_multiple_from_array(
data['submitted_answers'][answer_name], ['indent'])
student_answer_indent = list(
map(lambda x: x['indent'], student_answer_indent))
true_answer_indent = filter_multiple_from_array(
data['correct_answers'][answer_name], ['indent'])
true_answer_indent = list(
map(lambda x: x['indent'], true_answer_indent))
for i, indent in enumerate(student_answer_indent):
if true_answer_indent[i] == '-1' or int(
indent) == true_answer_indent[i]:
indent_score += 1
final_score = final_score * (indent_score / len(true_answer_indent))
data['partial_scores'][answer_name] = {
'score': round(final_score, 2),
'feedback': feedback,
'weight': answer_weight,
'first_wrong': first_wrong
}
def test_solve_dag():
problems = [(problem_1_dag, problem_1_groups), (problem_2_dag, problem_2_groups), (problem_3_dag, problem_3_groups)]
for depends_graph, group_belonging in problems:
solution = solve_dag(depends_graph, group_belonging)
assert len(solution) == grade_dag(solution, depends_graph, group_belonging)[0]
