fix: Python Version check upon importing some types

Import from python proper instead of typing_extensions when PEPs are accepted, depending on the python version

lxml-stubs/_types.pyi

@@ -1,3 +1,4 @@
+import sys
 from _typeshed import SupportsRead, SupportsWrite, _KT_co, _VT_co
 from os import PathLike
 from typing import (
@@ -10,7 +11,11 @@ from typing import (
     Protocol,
     TypeVar,
 )
-from typing_extensions import TypeAlias
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
 
 from .etree import QName, _Element, _ElementTree
 

lxml-stubs/etree/_docloader.pyi

@@ -1,7 +1,12 @@
+import sys
 from _typeshed import SupportsRead
 from abc import ABCMeta, abstractmethod
 from typing import Any, final, type_check_only
-from typing_extensions import Self
+
+if sys.version_info >= (3, 11):
+    from typing import Self
+else:
+    from typing_extensions import Self
 
 from .._types import _AnyStr
 

lxml-stubs/etree/_element.pyi

@@ -1,6 +1,16 @@
+import sys
 from _typeshed import _T
 from typing import Any, Generic, Iterable, Iterator, Literal, Mapping, overload
-from typing_extensions import Never, Self, deprecated
+
+if sys.version_info >= (3, 11):
+    from typing import Never, Self
+else:
+    from typing_extensions import Never, Self
+
+if sys.version_info >= (3, 13):
+    from typing import deprecated
+else:
+    from typing_extensions import deprecated
 
 from .. import _types as _t
 from ..cssselect import _CSSTransArg
@@ -318,8 +328,9 @@ class _ElementTree(Generic[_t._ET_co]):
         self,
         _xslt: _t._ElementOrTree,
         /,
-        extensions: _t.SupportsLaxedItems[tuple[_t._AnyStr, _t._AnyStr], XSLTExtension]
-        | None = ...,
+        extensions: (
+            _t.SupportsLaxedItems[tuple[_t._AnyStr, _t._AnyStr], XSLTExtension] | None
+        ) = ...,
         access_control: XSLTAccessControl | None = ...,
         *,  # all keywords are passed to XSLT.__call__
         profile_run: bool = ...,
@@ -354,9 +365,11 @@ class _Attrib:
     # explicitly checks for dict and _Attrib
     def update(
         self,
-        sequence_or_dict: _Attrib
-        | dict[Any, Any]  # Compromise with MutableMapping key/val invariance
-        | Iterable[tuple[_t._AttrName, _t._AttrVal]],
+        sequence_or_dict: (
+            _Attrib
+            | dict[Any, Any]  # Compromise with MutableMapping key/val invariance
+            | Iterable[tuple[_t._AttrName, _t._AttrVal]]
+        ),
     ) -> None: ...
     # Signature is pop(self, key, *default), yet followed by runtime
     # check and raise exception if multiple default argument is supplied

lxml-stubs/etree/_iterparse.pyi

@@ -1,6 +1,16 @@
+import sys
 from _typeshed import SupportsRead, _T_co
 from typing import IO, Iterable, Iterator, Literal, overload
-from typing_extensions import LiteralString, TypeAlias
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
+
+if sys.version_info >= (3, 11):
+    from typing import LiteralString
+else:
+    from typing_extensions import LiteralString
 
 from .._types import (
     SupportsLaxedItems,

lxml-stubs/etree/_module_func.pyi

@@ -1,5 +1,15 @@
+import sys
 from typing import Any, Iterable, Literal, final, overload
-from typing_extensions import TypeGuard, deprecated
+
+if sys.version_info >= (3, 10):
+    from typing import TypeGuard
+else:
+    from typing_extensions import TypeGuard
+
+if sys.version_info >= (3, 13):
+    from typing import deprecated
+else:
+    from typing_extensions import deprecated
 
 from .._types import (
     _ET,

lxml-stubs/etree/_module_misc.pyi

@@ -2,9 +2,14 @@
 # lxml.etree helper classes, exceptions and constants
 #
 
+import sys
 from abc import ABCMeta, abstractmethod
 from typing import overload
-from typing_extensions import LiteralString
+
+if sys.version_info >= (3, 11):
+    from typing import LiteralString
+else:
+    from typing_extensions import LiteralString
 
 from .._types import _AnyStr, _ElementOrTree, _TagName
 from ._dtd import DTD

lxml-stubs/etree/_nsclasses.pyi

@@ -1,3 +1,4 @@
+import sys
 from _typeshed import _KT, _T, _VT
 from typing import (
     Any,
@@ -9,7 +10,11 @@ from typing import (
     final,
     overload,
 )
-from typing_extensions import ParamSpec
+
+if sys.version_info >= (3, 10):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
 
 from .._types import SupportsLaxedItems
 from ._classlookup import ElementBase, ElementClassLookup, FallbackElementClassLookup

lxml-stubs/etree/_parser.pyi

@@ -1,6 +1,16 @@
+import sys
 from _typeshed import _T
 from typing import Any, Generic, Iterable, Iterator
-from typing_extensions import LiteralString, Self, deprecated
+
+if sys.version_info >= (3, 11):
+    from typing import LiteralString, Self
+else:
+    from typing_extensions import LiteralString, Self
+
+if sys.version_info >= (3, 13):
+    from typing import deprecated
+else:
+    from typing_extensions import deprecated
 
 from .._types import (
     SupportsLaxedItems,
@@ -84,6 +94,7 @@ class _FeedParser(Generic[_ET_co]):
         ```
         """
         ...
+
     @deprecated(
         "Removed since 5.0; deprecated since v2.0 (2008); renamed to set_element_class_lookup()"
     )

lxml-stubs/etree/_xmlid.pyi

@@ -1,5 +1,10 @@
+import sys
 from typing import Collection, Generic, Iterator, overload
-from typing_extensions import Self
+
+if sys.version_info >= (3, 11):
+    from typing import Self
+else:
+    from typing_extensions import Self
 
 from .._types import _ET, _AnyStr, _FileReadSource
 from ._element import _Element, _ElementTree

lxml-stubs/etree/_xpath.pyi

@@ -3,9 +3,14 @@
 # etree/_extension.pxi are merged here.
 #
 
+import sys
 from abc import abstractmethod
 from typing import Any, Callable, Generic, Mapping, Protocol, final, overload
-from typing_extensions import deprecated
+
+if sys.version_info >= (3, 13):
+    from typing import deprecated
+else:
+    from typing_extensions import deprecated
 
 from .._types import (
     _ET,

lxml-stubs/etree/_xslt.pyi

@@ -3,8 +3,18 @@
 #
 
 import abc
-from typing import Any, ClassVar, Literal, final, overload
-from typing_extensions import TypeAlias, TypedDict, deprecated
+import sys
+from typing import Any, ClassVar, Literal, TypedDict, final, overload
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
+
+if sys.version_info >= (3, 13):
+    from typing import deprecated
+else:
+    from typing_extensions import deprecated
 
 from .._types import SupportsLaxedItems, _AnyStr, _ElementOrTree, _FileWriteSource
 from ._classlookup import PIBase
@@ -46,6 +56,7 @@ class _XSLTResultTree(_ElementTree[_Element]):
         As opposed to the generic ``.write()`` method, ``.write_output()`` serialises
         the result as defined by the ``<xsl:output>`` tag.
         """
+
     @property
     def xslt_profile(self) -> _ElementTree[_Element] | None:
         """Return an ElementTree with profiling data for the stylesheet run"""
@@ -128,8 +139,9 @@ class XSLT:
     def __init__(
         self,
         xslt_input: _ElementOrTree,
-        extensions: SupportsLaxedItems[tuple[_AnyStr, _AnyStr], XSLTExtension]
-        | None = ...,
+        extensions: (
+            SupportsLaxedItems[tuple[_AnyStr, _AnyStr], XSLTExtension] | None
+        ) = ...,
         regexp: bool = ...,
         access_control: XSLTAccessControl | None = ...,
     ) -> None: ...
@@ -197,6 +209,7 @@ class XSLTExtension(metaclass=abc.ABCMeta):
         is no parent element in the current context (e.g. no content
         was added to the output tree yet).
         """
+
     @overload
     def apply_templates(
         self,
@@ -247,6 +260,7 @@ class XSLTExtension(metaclass=abc.ABCMeta):
         Note that the string discarding options will be ignored in this
         case.
         """
+
     @overload
     def process_children(
         self,

lxml-stubs/html/__init__.pyi

@@ -1,4 +1,9 @@
-from typing_extensions import LiteralString
+import sys
+
+if sys.version_info >= (3, 11):
+    from typing import LiteralString
+else:
+    from typing_extensions import LiteralString
 
 from ._element import (
     Classes as Classes,

lxml-stubs/html/_element.pyi

@@ -1,6 +1,11 @@
+import sys
 from _typeshed import _T
 from typing import Callable, Iterable, Iterator, Literal, MutableSet, overload
-from typing_extensions import Self
+
+if sys.version_info >= (3, 11):
+    from typing import Self
+else:
+    from typing_extensions import Self
 
 from .. import etree
 from .._types import (

lxml-stubs/html/_form.pyi

@@ -1,3 +1,4 @@
+import sys
 from typing import (
     Any,
     Callable,
@@ -7,7 +8,16 @@ from typing import (
     MutableMapping,
     MutableSet,
 )
-from typing_extensions import Never, TypeAlias
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
+
+if sys.version_info >= (3, 11):
+    from typing import Never
+else:
+    from typing_extensions import Never
 
 from .._types import SupportsLaxedItems, _AnyStr
 from ._element import HtmlElement

lxml-stubs/html/_funcs.pyi

@@ -1,12 +1,17 @@
+import sys
 from typing import AnyStr, Callable, Iterator, Literal, TypeVar, overload
-from typing_extensions import TypeAlias
 
-from .. import etree
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
+
 from .._types import _AnyStr, _OutputMethodArg
+from ..etree import _ElementTree
 from ._element import _HANDLE_FAILURES, HtmlElement
 
 _HtmlDoc_T = TypeVar("_HtmlDoc_T", str, bytes, HtmlElement)
-_HtmlElemOrTree: TypeAlias = HtmlElement | etree._ElementTree[HtmlElement]
+_HtmlElemOrTree: TypeAlias = HtmlElement | _ElementTree[HtmlElement]
 
 # These are HtmlMixin methods converted to standard functions,
 # with element or HTML string as first argument followed by all

lxml-stubs/html/_parse.pyi

@@ -1,5 +1,10 @@
+import sys
 from typing import Any, Iterable, MutableMapping
-from typing_extensions import TypeAlias
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
 
 from .. import etree
 from .._types import Unused, _AnyStr, _ElemClsLookupArg, _FileReadSource

lxml-stubs/html/clean.pyi

@@ -1,5 +1,10 @@
+import sys
 from typing import Iterable, Pattern, TypeVar, Union, overload
-from typing_extensions import TypeAlias
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
 
 from .._types import Unused, _ElemFactory
 from ..etree import _Element, _ElementTree

lxml-stubs/isoschematron.pyi

@@ -1,5 +1,10 @@
+import sys
 from typing import Any, ClassVar, overload
-from typing_extensions import LiteralString
+
+if sys.version_info >= (3, 11):
+    from typing import LiteralString
+else:
+    from typing_extensions import LiteralString
 
 from . import etree as _e
 from ._types import _ElementOrTree, _FileReadSource

lxml-stubs/objectify/__init__.pyi

@@ -1,4 +1,9 @@
-from typing_extensions import LiteralString
+import sys
+
+if sys.version_info >= (3, 11):
+    from typing import LiteralString
+else:
+    from typing_extensions import LiteralString
 
 from ._annotate import (
     PyType as PyType,