Fix implicit Optional [core] (#76719)

homeassistant/components/application_credentials/__init__.py

@@ -168,7 +168,7 @@ async def async_import_client_credential(
     hass: HomeAssistant,
     domain: str,
     credential: ClientCredential,
-    auth_domain: str = None,
+    auth_domain: str | None = None,
 ) -> None:
     """Import an existing credential from configuration.yaml."""
     if DOMAIN not in hass.data:

homeassistant/components/mobile_app/helpers.py

@@ -117,7 +117,7 @@ def registration_context(registration: dict) -> Context:
 
 
 def empty_okay_response(
-    headers: dict = None, status: HTTPStatus = HTTPStatus.OK
+    headers: dict | None = None, status: HTTPStatus = HTTPStatus.OK
 ) -> Response:
     """Return a Response with empty JSON object and a 200."""
     return Response(
@@ -129,7 +129,7 @@ def error_response(
     code: str,
     message: str,
     status: HTTPStatus = HTTPStatus.BAD_REQUEST,
-    headers: dict = None,
+    headers: dict | None = None,
 ) -> Response:
     """Return an error Response."""
     return json_response(
@@ -177,7 +177,7 @@ def webhook_response(
     *,
     registration: dict,
     status: HTTPStatus = HTTPStatus.OK,
-    headers: dict = None,
+    headers: dict | None = None,
 ) -> Response:
     """Return a encrypted response if registration supports it."""
     data = json.dumps(data, cls=JSONEncoder)

homeassistant/components/mqtt/mixins.py

@@ -287,7 +287,7 @@ async def async_discover_yaml_entities(
 async def async_get_platform_config_from_yaml(
     hass: HomeAssistant,
     platform_domain: str,
-    config_yaml: ConfigType = None,
+    config_yaml: ConfigType | None = None,
 ) -> list[ConfigType]:
     """Return a list of validated configurations for the domain."""
 

homeassistant/components/template/template_entity.py

@@ -79,7 +79,7 @@ LEGACY_FIELDS = {
 
 
 def rewrite_common_legacy_to_modern_conf(
-    entity_cfg: dict[str, Any], extra_legacy_fields: dict[str, str] = None
+    entity_cfg: dict[str, Any], extra_legacy_fields: dict[str, str] | None = None
 ) -> dict[str, Any]:
     """Rewrite legacy config."""
     entity_cfg = {**entity_cfg}