_test_parser.py

import re, sys, json

raw = sys.stdin.read()

def strip_num_prefix(s):
    return re.sub(r'^\d+\.\s*', '', s).strip()

def is_question_line(line):
    return bool(re.match(r'^\d+\.', line.strip()))

def parse_answer_line(line):
    s = line.strip()
    if not s:
        return None
    correct = False
    # '- +text'  (space optional between - and +)
    if re.match(r'^-\s*\+', s):
        correct = True
        text = re.sub(r'^-\s*\+\s*', '', s).strip()
    # '+- text'
    elif re.match(r'^\+\s*-\s*', s):
        correct = True
        text = re.sub(r'^\+\s*-\s*', '', s).strip()
    # 'text+' trailing plus
    elif re.match(r'^-\s+', s) and s.rstrip().endswith('+'):
        correct = True
        text = re.sub(r'^-\s+', '', s.rstrip()[:-1]).strip()
    # normal wrong answer
    elif re.match(r'^-\s*', s):
        correct = False
        text = re.sub(r'^-\s*', '', s).strip()
    else:
        return None
    return (text.strip(), correct)

lines = raw.splitlines()
questions = []
cur_q = None
cur_opts = []

def flush():
    global cur_q, cur_opts
    if cur_q and cur_opts:
        texts  = [t for t, _ in cur_opts]
        rights = [i for i, (_, c) in enumerate(cur_opts) if c]
        correct = rights[0] if len(rights) == 1 else rights
        questions.append({'question': cur_q, 'answers': texts, 'correct': correct})
    cur_q = None
    cur_opts = []

for line in lines:
    line = line.rstrip()
    if not line:
        continue
    if is_question_line(line):
        flush()
        cur_q = strip_num_prefix(line).rstrip(':').strip()
        cur_opts = []
        continue
    parsed = parse_answer_line(line)
    if parsed and cur_q is not None:
        text, correct = parsed
        if text:
            cur_opts.append((text, correct))

flush()

for i, q in enumerate(questions, 1):
    rights = q['correct'] if isinstance(q['correct'], list) else [q['correct']]
    qtext = q['question'][:90]
    print(f'Q{i}: {qtext}')
    for j, a in enumerate(q['answers']):
        mark = 'V' if j in rights else ' '
        atext = a[:80]
        print(f'  [{mark}] {atext}')
    print()

print(f'Total parsed: {len(questions)}')