Refactored PerSignalConfig to better support type checkers

src/ophyd_async/core/_readable.py

@@ -1,7 +1,7 @@
 import asyncio
 import warnings
 from contextlib import contextmanager
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from typing import (
  Any,
  Callable,
@@ -32,12 +32,12 @@
 
 
 @dataclass
-class PerSignalConfig(Dict[SignalW[T], T]):
- _signal_configuration: Dict[SignalW[Any], Any] = field(default_factory=dict)
+class PerSignalConfig(Dict[SignalW, Any]):
+ def __setitem__(self, signal: SignalW[T], value: T):
+ super().__setitem__(signal, value)
 
- @property
- def signal_configuration(self) -> Dict[SignalW[Any], Any]:
- return self._signal_configuration
+ def __getitem__(self, signal: SignalW[T]) -> T:
+ return super().__getitem__[signal]
 
 
 class StandardReadable(