Improve zha typing [core.decorators] (#68650)

homeassistant/components/zha/core/decorators.py

@@ -2,37 +2,32 @@
 from __future__ import annotations
 
 from collections.abc import Callable
-from typing import TypeVar
+from typing import Any, TypeVar, Union
 
-CALLABLE_T = TypeVar("CALLABLE_T", bound=Callable)  # pylint: disable=invalid-name
+_TypeT = TypeVar("_TypeT", bound=type[Any])
 
 
-class DictRegistry(dict):
+class DictRegistry(dict[Union[int, str], _TypeT]):
     """Dict Registry of items."""
 
-    def register(
-        self, name: int | str, item: str | CALLABLE_T = None
-    ) -> Callable[[CALLABLE_T], CALLABLE_T]:
+    def register(self, name: int | str) -> Callable[[_TypeT], _TypeT]:
         """Return decorator to register item with a specific name."""
 
-        def decorator(channel: CALLABLE_T) -> CALLABLE_T:
+        def decorator(channel: _TypeT) -> _TypeT:
             """Register decorated channel or item."""
-            if item is None:
-                self[name] = channel
-            else:
-                self[name] = item
+            self[name] = channel
             return channel
 
         return decorator
 
 
-class SetRegistry(set):
+class SetRegistry(set[Union[int, str]]):
     """Set Registry of items."""
 
-    def register(self, name: int | str) -> Callable[[CALLABLE_T], CALLABLE_T]:
+    def register(self, name: int | str) -> Callable[[_TypeT], _TypeT]:
         """Return decorator to register item with a specific name."""
 
-        def decorator(channel: CALLABLE_T) -> CALLABLE_T:
+        def decorator(channel: _TypeT) -> _TypeT:
             """Register decorated channel or item."""
             self.add(name)
             return channel

homeassistant/components/zha/core/registries.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 import collections
 from collections.abc import Callable
 import dataclasses
+from typing import TYPE_CHECKING
 
 import attr
 from zigpy import zcl
@@ -15,8 +16,11 @@ from homeassistant.const import Platform
 
 # importing channels updates registries
 from . import channels as zha_channels  # noqa: F401 pylint: disable=unused-import
-from .decorators import CALLABLE_T, DictRegistry, SetRegistry
-from .typing import ChannelType
+from .decorators import DictRegistry, SetRegistry
+from .typing import CALLABLE_T, ChannelType
+
+if TYPE_CHECKING:
+    from .channels.base import ClientChannel, ZigbeeChannel
 
 GROUP_ENTITY_DOMAINS = [Platform.LIGHT, Platform.SWITCH, Platform.FAN]
 
@@ -98,8 +102,8 @@ DEVICE_CLASS = {
 }
 DEVICE_CLASS = collections.defaultdict(dict, DEVICE_CLASS)
 
-CLIENT_CHANNELS_REGISTRY = DictRegistry()
-ZIGBEE_CHANNEL_REGISTRY = DictRegistry()
+CLIENT_CHANNELS_REGISTRY: DictRegistry[type[ClientChannel]] = DictRegistry()
+ZIGBEE_CHANNEL_REGISTRY: DictRegistry[type[ZigbeeChannel]] = DictRegistry()
 
 
 def set_or_callable(value):