def calculate_feedback(grouped):
result = {}
for username in grouped:
if not is_valid_matrikel_nummer(username):
continue
value = grouped[username]
feedback_lengths = [int(line[COMMENT_LENGTH_COL]) for line in value]
median_feedback = median(feedback_lengths)
result[username] = median_feedback
return result
def handle_forum_entries(grouped):
result = {}
for username in grouped:
if not is_valid_matrikel_nummer(username):
continue
value = grouped[username]
written_count = len(value)
subject_lengths = [int(line[SUBJ_COL]) for line in value]
text_lengths = [int(line[TEXT_COL]) for line in value]
result[username] = (written_count, average(subject_lengths), median(text_lengths))
return result
def calculate_avg_score(grouped):
result = {}
for username in grouped:
if not is_valid_matrikel_nummer(username):
continue
value = grouped[username]
by_result_id = groupby(value, [RESULT_ID_COL])
result_scores = [float(line[0][RESULT_SCORE_COL]) \
for line in by_result_id.values()]
avg_score = average(result_scores)
num_scores = len(by_result_id.keys())
max_score = max(result_scores)
if max_score == 0:
quality_score = 0
else:
quality_score = float(sum(result_scores)) / float(max_score)
result[username] = (quality_score, avg_score, num_scores)
return result
def count_pluses(d):
return dict((x, len(d[x])) for x in d\
if is_valid_matrikel_nummer(x))
def calculate_read(grouped):
return dict((username, len(grouped[username])) for username in grouped\
if is_valid_matrikel_nummer(username))
