django 运行 Python 无法访问

我直接把代码移进的 view，然后用的一个函数调用这个类 class TrainsCollection: header = '车次车站时间历时一等二等软卧硬卧硬座无座'.split()

def __init__(self, available_trains, options):
    """
    :param available_trains: 官网提取到的 json 数据列表
    :param options: 查询的选项, 如高铁, 动车, etc...
    """
    self.available_trains = available_trains
    self.options = options
"""切割"""
def _cut_train(self):
    saperated_info = []
    for i in range(len(self.available_trains)):
        saperated_info.append((self.available_trains[i]).split('|'))
    """构建字典列表"""
    dict_header = ['train_number', 'from_station', 'to_station', 'from_time', 'to_time', 'spend_time',
    'first_class', 'second_class', 'soft_sleeper', 'hard_sleeper', 'hard_seat', 'none_seat']
    refer_to_num = [3, 4, 5, 8, 9, 10, 31, 30, 23, 26, 28, 29]
    train_list = []
    train_dict = {}
    for times in range(len(saperated_info)):
        for key in range(len(dict_header)):
            if saperated_info[times][refer_to_num[key]]:
                train_dict[dict_header[key]] = saperated_info[times][refer_to_num[key]]
            else:
                train_dict[dict_header[key]] = '--'
        train_list.append(copy.deepcopy(train_dict))
    return train_list

@property
def trains(self):
    for raw_train in self._cut_train():
        train_no = raw_train['train_number']
        initial = train_no[0].lower()
        if not self.options or initial in self.options:
            train = [
                train_no,
                '\n'.join([Fore.GREEN + _get_keys(raw_train['from_station']) + Fore.RESET,
                Fore.RED + _get_keys(raw_train['to_station']) + Fore.RESET]),
                '\n'.join([Fore.GREEN + raw_train['from_time'] + Fore.RESET,
                Fore.RED + raw_train['to_time'] + Fore.RESET]),
                raw_train['spend_time'],
                raw_train['first_class'],
                raw_train['second_class'],
                raw_train['soft_sleeper'],
                raw_train['hard_sleeper'],
                raw_train['hard_seat'],
                raw_train['none_seat'],
            ]
            yield train

def _get_keys(station_eg):
    for key in stations:
        if stations[key] == station_eg:
def pretty_print(self):
    pt = PrettyTable()
    pt._set_field_names(self.header)
    for train in self.trains:
        pt.add_row(train)
    content = PrettyTable.whatever()
    return HttpResponse('<pre>{}</pre>'.format(content))

错误提示： def pretty_print(self): ^ IndentationError: expected an indented block