diff options
Diffstat (limited to 'lib/sqlalchemy/event/registry.py')
| -rw-r--r-- | lib/sqlalchemy/event/registry.py | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/lib/sqlalchemy/event/registry.py b/lib/sqlalchemy/event/registry.py index e20d3e0b5..449f39187 100644 --- a/lib/sqlalchemy/event/registry.py +++ b/lib/sqlalchemy/event/registry.py @@ -22,7 +22,6 @@ import typing from typing import Any from typing import Callable from typing import cast -from typing import ClassVar from typing import Deque from typing import Dict from typing import Generic @@ -35,7 +34,6 @@ import weakref from .. import exc from .. import util -from ..util.typing import Protocol if typing.TYPE_CHECKING: from .attr import RefCollection @@ -46,7 +44,10 @@ _ListenerFnKeyType = Union[int, Tuple[int, int]] _EventKeyTupleType = Tuple[int, str, _ListenerFnKeyType] -class _EventTargetType(Protocol): +_ET = TypeVar("_ET", bound="EventTarget") + + +class EventTarget: """represents an event target, that is, something we can listen on either with that target as a class or as an instance. @@ -55,10 +56,10 @@ class _EventTargetType(Protocol): """ - dispatch: ClassVar[dispatcher[Any]] + __slots__ = () + dispatch: dispatcher[Any] -_ET = TypeVar("_ET", bound=_EventTargetType) _RefCollectionToListenerType = Dict[ "weakref.ref[RefCollection[Any]]", @@ -104,7 +105,7 @@ def _collection_gced(ref: weakref.ref[Any]) -> None: if not _collection_to_key or ref not in _collection_to_key: return - ref = cast("weakref.ref[RefCollection[_EventTargetType]]", ref) + ref = cast("weakref.ref[RefCollection[EventTarget]]", ref) listener_to_key = _collection_to_key.pop(ref) for key in listener_to_key.values(): |