refactor(generic):

get rid of generic behaviour for base session

aiogram/api/client/bot.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import datetime
 from contextlib import asynccontextmanager
-from typing import Any, AsyncIterator, List, Optional, TypeVar, Union, cast
+from typing import Any, AsyncIterator, List, Optional, TypeVar, Union
 
 from async_lru import alru_cache
 
@@ -110,7 +110,7 @@ from ..types import (
     WebhookInfo,
 )
 from .session.aiohttp import AiohttpSession
-from .session.base import PT, BaseSession
+from .session.base import BaseSession
 
 T = TypeVar("T")
 
@@ -121,15 +121,12 @@ class Bot(ContextInstanceMixin["Bot"]):
     """
 
     def __init__(
-        self,
-        token: str,
-        session: Optional[BaseSession[PT]] = None,
-        parse_mode: Optional[str] = None,
+        self, token: str, session: Optional[BaseSession] = None, parse_mode: Optional[str] = None,
     ) -> None:
         validate_token(token)
 
         if session is None:
-            session = cast(BaseSession[PT], AiohttpSession())
+            session = AiohttpSession()
 
         self.session = session
         self.parse_mode = parse_mode

aiogram/api/client/session/aiohttp.py

@@ -71,7 +71,7 @@ def _prepare_connector(chain_or_plain: _ProxyType) -> Tuple[Type["TCPConnector"]
     return ChainProxyConnector, dict(proxy_infos=infos)
 
 
-class AiohttpSession(BaseSession[_ProxyType]):
+class AiohttpSession(BaseSession):
     def __init__(
         self,
         api: TelegramAPIServer = PRODUCTION,
@@ -88,7 +88,9 @@ class AiohttpSession(BaseSession[_ProxyType]):
 
         if self.proxy:
             try:
-                self._connector_type, self._connector_init = _prepare_connector(self.proxy)
+                self._connector_type, self._connector_init = _prepare_connector(
+                    cast(_ProxyType, self.proxy)
+                )
             except ImportError as exc:  # pragma: no cover
                 raise UserWarning(
                     "In order to use aiohttp client for proxy requests, install "

aiogram/api/client/session/base.py

@@ -4,7 +4,7 @@ import abc
 import datetime
 import json
 from types import TracebackType
-from typing import Any, AsyncGenerator, Callable, Generic, Optional, Type, TypeVar, Union
+from typing import Any, AsyncGenerator, Callable, Optional, Type, TypeVar, Union
 
 from aiogram.utils.exceptions import TelegramAPIError
 
@@ -15,7 +15,7 @@ T = TypeVar("T")
 PT = TypeVar("PT")
 
 
-class BaseSession(abc.ABC, Generic[PT]):
+class BaseSession(abc.ABC):
     def __init__(
         self,
         api: Optional[TelegramAPIServer] = None,
@@ -74,7 +74,7 @@ class BaseSession(abc.ABC, Generic[PT]):
             return {k: self.clean_json(v) for k, v in value.items() if v is not None}
         return value
 
-    async def __aenter__(self) -> BaseSession[PT]:
+    async def __aenter__(self) -> BaseSession:
         return self
 
     async def __aexit__(

tests/test_api/test_client/test_session/test_base_session.py

@@ -1,6 +1,5 @@
 import datetime
-import types
-from typing import Any, AsyncContextManager, AsyncGenerator
+from typing import AsyncContextManager, AsyncGenerator
 
 import pytest
 
@@ -14,7 +13,7 @@ except ImportError:
     from unittest.mock import AsyncMock as CoroutineMock, patch  # type: ignore
 
 
-class CustomSession(BaseSession[Any]):
+class CustomSession(BaseSession):
     async def close(self):
         pass