fix: typing Self import fix for older python versions

Author: jorwoods

tableauserverclient/models/group_item.py

@@ -1,6 +1,7 @@
-from typing import Callable, Optional, Self, TYPE_CHECKING
+from typing import Callable, Optional, TYPE_CHECKING
 
 from defusedxml.ElementTree import fromstring
+from typing_extensions import Self
 
 from .exceptions import UnpopulatedPropertyError
 from .property_decorators import property_not_empty, property_is_enum

tableauserverclient/models/groupset_item.py

@@ -1,7 +1,8 @@
-from typing import Optional, Self
+from typing import Optional
 import xml.etree.ElementTree as ET
 
 from defusedxml.ElementTree import fromstring
+from typing_extensions import Self
 
 from tableauserverclient.models.group_item import GroupItem
 from tableauserverclient.models.reference_item import ResourceReference

tableauserverclient/models/reference_item.py

@@ -1,4 +1,4 @@
-from typing import Self
+from typing_extensions import Self
 
 
 class ResourceReference:

tableauserverclient/models/user_item.py

@@ -2,9 +2,10 @@
 import xml.etree.ElementTree as ET
 from datetime import datetime
 from enum import IntEnum
-from typing import Optional, TYPE_CHECKING, Self
+from typing import Optional, TYPE_CHECKING
 
 from defusedxml.ElementTree import fromstring
+from typing_extensions import Self
 
 from tableauserverclient.datetime_helpers import parse_datetime
 from tableauserverclient.models.site_item import SiteAuthConfiguration