Enable strict typing for history_stats (#107273)

.strict-typing

@@ -193,6 +193,7 @@ homeassistant.components.hardkernel.*
 homeassistant.components.hardware.*
 homeassistant.components.here_travel_time.*
 homeassistant.components.history.*
+homeassistant.components.history_stats.*
 homeassistant.components.holiday.*
 homeassistant.components.homeassistant.exposed_entities
 homeassistant.components.homeassistant.triggers.event

homeassistant/components/history_stats/sensor.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 
 from abc import abstractmethod
 import datetime
+from typing import Any, TypeVar
 
 import voluptuous as vol
 
@@ -53,8 +54,10 @@ UNITS: dict[str, str] = {
 }
 ICON = "mdi:chart-line"
 
+_T = TypeVar("_T", bound=dict[str, Any])
 
-def exactly_two_period_keys(conf):
+
+def exactly_two_period_keys(conf: _T) -> _T:
     """Ensure exactly 2 of CONF_PERIOD_KEYS are provided."""
     if sum(param in conf for param in CONF_PERIOD_KEYS) != 2:
         raise vol.Invalid(

mypy.ini

@@ -1691,6 +1691,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.history_stats.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.holiday.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true