Deprecate Python 3.8 (#57079)

homeassistant/bootstrap.py

@@ -17,7 +17,10 @@
 
 from homeassistant import config as conf_util, config_entries, core, loader
 from homeassistant.components import http
-from homeassistant.const import REQUIRED_NEXT_PYTHON_DATE, REQUIRED_NEXT_PYTHON_VER
+from homeassistant.const import (
+    REQUIRED_NEXT_PYTHON_HA_RELEASE,
+    REQUIRED_NEXT_PYTHON_VER,
+)
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import area_registry, device_registry, entity_registry
 from homeassistant.helpers.dispatcher import async_dispatcher_send
@@ -240,11 +243,14 @@ async def async_from_config_dict(
     stop = monotonic()
     _LOGGER.info("Home Assistant initialized in %.2fs", stop - start)
 
-    if REQUIRED_NEXT_PYTHON_DATE and sys.version_info[:3] < REQUIRED_NEXT_PYTHON_VER:
+    if (
+        REQUIRED_NEXT_PYTHON_HA_RELEASE
+        and sys.version_info[:3] < REQUIRED_NEXT_PYTHON_VER
+    ):
         msg = (
             "Support for the running Python version "
             f"{'.'.join(str(x) for x in sys.version_info[:3])} is deprecated and will "
-            f"be removed in the first release after {REQUIRED_NEXT_PYTHON_DATE}. "
+            f"be removed in Home Assistant {REQUIRED_NEXT_PYTHON_HA_RELEASE}. "
             "Please upgrade Python to "
             f"{'.'.join(str(x) for x in REQUIRED_NEXT_PYTHON_VER)} or "
             "higher."

homeassistant/const.py

@@ -11,7 +11,7 @@
 REQUIRED_PYTHON_VER: Final[tuple[int, int, int]] = (3, 8, 0)
 # Truthy date string triggers showing related deprecation warning messages.
 REQUIRED_NEXT_PYTHON_VER: Final[tuple[int, int, int]] = (3, 9, 0)
-REQUIRED_NEXT_PYTHON_DATE: Final = ""
+REQUIRED_NEXT_PYTHON_HA_RELEASE: Final = "2022.1"
 
 # Format for platform files
 PLATFORM_FORMAT: Final = "{platform}.{domain}"