From fbc91d3d3d0fcb8f213928f14914218e1bb367ad Mon Sep 17 00:00:00 2001
From: epenet <6771947+epenet@users.noreply.github.com>
Date: Fri, 6 Feb 2026 12:01:23 +0100
Subject: [PATCH] Remove str from sensor state class (#161686)

---
 homeassistant/components/sensor/__init__.py | 8 ++++----
 homeassistant/components/sensor/const.py    | 2 +-
 pylint/plugins/hass_enforce_type_hints.py   | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/homeassistant/components/sensor/__init__.py b/homeassistant/components/sensor/__init__.py
index d6829d35329..3148b0d13c2 100644
--- a/homeassistant/components/sensor/__init__.py
+++ b/homeassistant/components/sensor/__init__.py
@@ -112,7 +112,7 @@ class SensorEntityDescription(EntityDescription, frozen_or_thawed=True):
     last_reset: datetime | None = None
     native_unit_of_measurement: str | None = None
     options: list[str] | None = None
-    state_class: SensorStateClass | str | None = None
+    state_class: SensorStateClass | None = None
     suggested_display_precision: int | None = None
     suggested_unit_of_measurement: str | None = None
     unit_of_measurement: None = None  # Type override, use native_unit_of_measurement
@@ -120,7 +120,7 @@ class SensorEntityDescription(EntityDescription, frozen_or_thawed=True):
 
 def _numeric_state_expected(
     device_class: SensorDeviceClass | None,
-    state_class: SensorStateClass | str | None,
+    state_class: SensorStateClass | None,
     native_unit_of_measurement: str | None,
     suggested_display_precision: int | None,
 ) -> bool:
@@ -188,7 +188,7 @@ class SensorEntity(Entity, cached_properties=CACHED_PROPERTIES_WITH_ATTR_):
     _attr_native_unit_of_measurement: str | None
     _attr_native_value: StateType | date | datetime | Decimal = None
     _attr_options: list[str] | None
-    _attr_state_class: SensorStateClass | str | None
+    _attr_state_class: SensorStateClass | None
     _attr_state: None = None  # Subclasses of SensorEntity should not set this
     _attr_suggested_display_precision: int | None
     _attr_suggested_unit_of_measurement: str | None
@@ -329,7 +329,7 @@ class SensorEntity(Entity, cached_properties=CACHED_PROPERTIES_WITH_ATTR_):
         return None
 
     @cached_property
-    def state_class(self) -> SensorStateClass | str | None:
+    def state_class(self) -> SensorStateClass | None:
         """Return the state class of this entity, if any."""
         if hasattr(self, "_attr_state_class"):
             return self._attr_state_class
diff --git a/homeassistant/components/sensor/const.py b/homeassistant/components/sensor/const.py
index 108ed318ccb..88fde1569c0 100644
--- a/homeassistant/components/sensor/const.py
+++ b/homeassistant/components/sensor/const.py
@@ -835,7 +835,7 @@ DEVICE_CLASS_STATE_CLASSES: dict[SensorDeviceClass, set[SensorStateClass]] = {
 }
 
 
-STATE_CLASS_UNITS: dict[SensorStateClass | str, set[type[StrEnum] | str | None]] = {
+STATE_CLASS_UNITS: dict[SensorStateClass, set[type[StrEnum] | str | None]] = {
     SensorStateClass.MEASUREMENT_ANGLE: {DEGREE},
 }
 
diff --git a/pylint/plugins/hass_enforce_type_hints.py b/pylint/plugins/hass_enforce_type_hints.py
index b09bd55e43a..47416da20cc 100644
--- a/pylint/plugins/hass_enforce_type_hints.py
+++ b/pylint/plugins/hass_enforce_type_hints.py
@@ -2526,7 +2526,7 @@ _INHERITANCE_MATCH: dict[str, list[ClassTypeHintMatch]] = {
                 ),
                 TypeHintMatch(
                     function_name="state_class",
-                    return_type=["SensorStateClass", "str", None],
+                    return_type=["SensorStateClass", None],
                     mandatory=True,
                 ),
                 TypeHintMatch(