diff --git a/Lib/asyncio/timeouts.py b/Lib/asyncio/timeouts.py
index b841e477df9c46..4c1f0b6c9e1059 100644
--- a/Lib/asyncio/timeouts.py
+++ b/Lib/asyncio/timeouts.py
@@ -1,6 +1,7 @@
import contextlib
import enum
+from dataclasses import dataclass
from types import TracebackType
from typing import final, Any, Iterator, Optional, Type
@@ -27,18 +28,13 @@ class _State(enum.Enum):
@final
+@dataclass(slots=True)
class CancelScope:
- __slots__ = ("_deadline", "_loop", "_state", "_task", "_timeout_handler")
-
- def __init__(
- self, deadline: Optional[float], loop: events.AbstractEventLoop
- ) -> None:
- self._loop = loop
- self._state = _State.CREATED
-
- self._timeout_handler: Optional[events.TimerHandle] = None
- self._task: Optional[tasks.Task[Any]] = None
- self._deadline = deadline
+ _deadline: float | None
+ _loop: events.AbstractEventLoop
+ _state: _State = _State.CREATED
+ _task: tasks.Task[Any] | None = None
+ _timeout_handler: events.TimerHandle | None = None
@property
def deadline(self) -> Optional[float]:
@@ -63,7 +59,7 @@ def cancelling(self) -> bool:
def __repr__(self) -> str:
info = [str(self._state)]
if self._state == _State.ENTERED and self._deadline is not None:
- info.append("deadline={self._deadline}")
+ info.append(f"deadline={self._deadline}")
cls_name = self.__class__.__name__
return f"<{cls_name} at {id(self):#x}, {' '.join(info)}>"
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