[stdlib] Add missing Final (#14613)

stdlib/xml/sax/__init__.pyi

@@ -1,7 +1,7 @@
 import sys
 from _typeshed import ReadableBuffer, StrPath, SupportsRead, _T_co
 from collections.abc import Iterable
-from typing import Protocol, type_check_only
+from typing import Final, Protocol, type_check_only
 from typing_extensions import TypeAlias
 from xml.sax._exceptions import (
     SAXException as SAXException,
@@ -19,7 +19,7 @@ class _SupportsReadClose(SupportsRead[_T_co], Protocol[_T_co]):
 
 _Source: TypeAlias = StrPath | _SupportsReadClose[bytes] | _SupportsReadClose[str]
 
-default_parser_list: list[str]
+default_parser_list: Final[list[str]]
 
 def make_parser(parser_list: Iterable[str] = ()) -> XMLReader: ...
 def parse(source: _Source, handler: ContentHandler, errorHandler: ErrorHandler = ...) -> None: ...

stdlib/xml/sax/expatreader.pyi

@@ -1,7 +1,7 @@
 import sys
 from _typeshed import ReadableBuffer
 from collections.abc import Mapping
-from typing import Any, Literal, overload
+from typing import Any, Final, Literal, overload
 from typing_extensions import TypeAlias
 from xml.sax import _Source, xmlreader
 from xml.sax.handler import _ContentHandlerProtocol
@@ -11,7 +11,7 @@ if sys.version_info >= (3, 10):
 
 _BoolType: TypeAlias = Literal[0, 1] | bool
 
-version: str
+version: Final[str]
 AttributesImpl = xmlreader.AttributesImpl
 AttributesNSImpl = xmlreader.AttributesNSImpl
 

stdlib/xml/sax/handler.pyi

@@ -1,8 +1,8 @@
 import sys
-from typing import Literal, NoReturn, Protocol, type_check_only
+from typing import Final, NoReturn, Protocol, type_check_only
 from xml.sax import xmlreader
 
-version: str
+version: Final[str]
 
 @type_check_only
 class _ErrorHandlerProtocol(Protocol):  # noqa: Y046  # Protocol is not used
@@ -62,20 +62,20 @@ class _EntityResolverProtocol(Protocol):  # noqa: Y046  # Protocol is not used
 class EntityResolver:
     def resolveEntity(self, publicId: str | None, systemId: str) -> str: ...
 
-feature_namespaces: str
-feature_namespace_prefixes: str
-feature_string_interning: str
-feature_validation: str
-feature_external_ges: str
-feature_external_pes: str
-all_features: list[str]
-property_lexical_handler: Literal["http://xml.org/sax/properties/lexical-handler"]
-property_declaration_handler: Literal["http://xml.org/sax/properties/declaration-handler"]
-property_dom_node: Literal["http://xml.org/sax/properties/dom-node"]
-property_xml_string: Literal["http://xml.org/sax/properties/xml-string"]
-property_encoding: Literal["http://www.python.org/sax/properties/encoding"]
-property_interning_dict: Literal["http://www.python.org/sax/properties/interning-dict"]
-all_properties: list[str]
+feature_namespaces: Final = "http://xml.org/sax/features/namespaces"
+feature_namespace_prefixes: Final = "http://xml.org/sax/features/namespace-prefixes"
+feature_string_interning: Final = "http://xml.org/sax/features/string-interning"
+feature_validation: Final = "http://xml.org/sax/features/validation"
+feature_external_ges: Final[str]  # too long string
+feature_external_pes: Final[str]  # too long string
+all_features: Final[list[str]]
+property_lexical_handler: Final = "http://xml.org/sax/properties/lexical-handler"
+property_declaration_handler: Final = "http://xml.org/sax/properties/declaration-handler"
+property_dom_node: Final = "http://xml.org/sax/properties/dom-node"
+property_xml_string: Final = "http://xml.org/sax/properties/xml-string"
+property_encoding: Final = "http://www.python.org/sax/properties/encoding"
+property_interning_dict: Final[str]  # too long string
+all_properties: Final[list[str]]
 
 if sys.version_info >= (3, 10):
     class LexicalHandler: