fix PathInfo instantiation in Python 3.12 (treeverse#10328)

Author: skshetry

dvc/testing/path_info.py

@@ -1,6 +1,7 @@
 import os
 import pathlib
 import posixpath
+import sys
 from typing import Callable, ClassVar
 from urllib.parse import urlparse
 
@@ -27,12 +28,13 @@ class PathInfo(pathlib.PurePath, _BasePath):
     __slots__ = ()
     scheme = "local"
 
-    def __new__(cls, *args):
-        # Construct a proper subclass depending on current os
-        if cls is PathInfo:
-            cls = WindowsPathInfo if os.name == "nt" else PosixPathInfo
+    if sys.version_info < (3, 12):
 
-        return cls._from_parts(args)  # type: ignore[attr-defined]
+        def __new__(cls, *args):
+            if cls is PathInfo:
+                cls = WindowsPathInfo if os.name == "nt" else PosixPathInfo
+
+            return cls._from_parts(args)  # type: ignore[attr-defined]
 
     def as_posix(self):
         f = self._flavour  # type: ignore[attr-defined]
@@ -67,7 +69,7 @@ def relpath(self, other):
 
     def isin(self, other):
         if isinstance(other, (str, bytes)):
-            other = self.__class__(other)
+            other = self.__class__(other)  # type: ignore[arg-type]
         elif self.__class__ != other.__class__:
             return False
         # Use cached casefolded parts to compare paths

dvc/testing/tmp_dir.py

@@ -67,13 +67,12 @@ def url(self):
     def config(self):
         return {"url": self.url}
 
-    def __new__(cls, *args, **kwargs):
-        if cls is TmpDir:
-            cls = WindowsTmpDir if os.name == "nt" else PosixTmpDir
+    if sys.version_info < (3, 12):
+
+        def __new__(cls, *args, **kwargs):
+            if cls is TmpDir:
+                cls = WindowsTmpDir if os.name == "nt" else PosixTmpDir
 
-        if sys.version_info >= (3, 12):
-            return object.__new__(cls)
-        else:  # noqa: RET505
             # init parameter and `_init` method has been removed in Python 3.10.
             kw = {"init": False} if sys.version_info < (3, 10) else {}
             self = cls._from_parts(args, **kw)  # type: ignore[attr-defined]