From 1a1eeb2274903cb18f4fb99a4ea3af94f4a04059 Mon Sep 17 00:00:00 2001
From: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Date: Wed, 20 Jul 2022 04:02:03 +0200
Subject: [PATCH] Allow for subclass typing with StatisticsBase (#75476)

---
 homeassistant/components/recorder/db_schema.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/homeassistant/components/recorder/db_schema.py b/homeassistant/components/recorder/db_schema.py
index 36487353e25..4777eeb500e 100644
--- a/homeassistant/components/recorder/db_schema.py
+++ b/homeassistant/components/recorder/db_schema.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 from collections.abc import Callable
 from datetime import datetime, timedelta
 import logging
-from typing import Any, cast
+from typing import Any, TypeVar, cast
 
 import ciso8601
 from fnvhash import fnv1a_32
@@ -55,6 +55,8 @@ Base = declarative_base()
 
 SCHEMA_VERSION = 29
 
+_StatisticsBaseSelfT = TypeVar("_StatisticsBaseSelfT", bound="StatisticsBase")
+
 _LOGGER = logging.getLogger(__name__)
 
 TABLE_EVENTS = "events"
@@ -443,7 +445,9 @@ class StatisticsBase:
     sum = Column(DOUBLE_TYPE)
 
     @classmethod
-    def from_stats(cls, metadata_id: int, stats: StatisticData) -> StatisticsBase:
+    def from_stats(
+        cls: type[_StatisticsBaseSelfT], metadata_id: int, stats: StatisticData
+    ) -> _StatisticsBaseSelfT:
         """Create object from a statistics."""
         return cls(  # type: ignore[call-arg,misc]
             metadata_id=metadata_id,