修复一些PyCharm警告

models/avatar.py

@@ -25,7 +25,7 @@ _avatar_url_cache: Dict[int, str] = {}
 # 正在获取头像的Future，user_id -> Future
 _uid_fetch_future_map: Dict[int, asyncio.Future] = {}
 # 正在获取头像的user_id队列
-_uid_queue_to_fetch = None
+_uid_queue_to_fetch: Optional[asyncio.Queue] = None
 # 上次被B站ban时间
 _last_fetch_banned_time: Optional[datetime.datetime] = None
 

models/database.py

@@ -13,7 +13,7 @@ engine = None
 DbSession: Optional[Type[sqlalchemy.orm.Session]] = None
 
 
-def init(debug):
+def init(_debug):
     cfg = config.get_config()
     global engine, DbSession
     # engine = sqlalchemy.create_engine(cfg.database_url, echo=debug)
@@ -28,7 +28,7 @@ def get_session():
     session = DbSession()
     try:
         yield session
-    except:
+    except BaseException:
         session.rollback()
         raise
     finally:

models/translate.py

@@ -23,7 +23,7 @@ NO_TRANSLATE_TEXTS = {
 }
 
 _main_event_loop = asyncio.get_event_loop()
-_http_session = None
+_http_session: Optional[aiohttp.ClientSession] = None
 _translate_providers: List['TranslateProvider'] = []
 # text -> res
 _translate_cache: Dict[str, str] = {}