QUOTATION_MARKS = {'"', '\''}
KEY_VALUE_LINE = 0
GROUP_HEADER_LINE = 1
COMMENT_LINE = 2

def reverse_dict(d):
    return {k: v for k, v in list(reversed(d.items()))}

def parse_key_value_line(line):
    if '=' not in line:
        return {'': ''}
    return {line.split('=')[0].strip(): '='.join(line.split('=')[1:]).strip()}


def parse_group_header(line):
    if line.startswith('[') and line.endswith(']'):
        return line[1:-1]


def parse_line_type(line):
    line = line.strip()
    if line.startswith('#'):
        return COMMENT_LINE
    if line.startswith('[') and line.endswith(']'):
        return GROUP_HEADER_LINE
    if '=' in line:
        return KEY_VALUE_LINE

def compress_conf(conf):
    while '\n\n' in conf:
        conf = conf.replace('\n\n', '\n')
    return conf.strip()

def parse_ini(conf):
    conf = compress_conf(conf)
    result = {}
    current_group = {}
    for line in list(reversed(conf.split('\n'))):
        line = line.strip()
        if parse_line_type(line) == COMMENT_LINE:
            continue
        if parse_line_type(line) == GROUP_HEADER_LINE:
            result[parse_group_header(line)] = reverse_dict(current_group)
            current_group = {}
        if parse_line_type(line) == KEY_VALUE_LINE:
            current_group = current_group | parse_key_value_line(line)
    return reverse_dict(result)