GH-113568: Stop raising deprecation warnings from pathlib ABCs (#113757)

Lib/pathlib/__init__.py

@@ -166,6 +166,33 @@ class PurePath(_abc.PurePathBase):
             return NotImplemented
         return self._parts_normcase >= other._parts_normcase
 
+    def relative_to(self, other, /, *_deprecated, walk_up=False):
+        """Return the relative path to another path identified by the passed
+        arguments.  If the operation is not possible (because this is not
+        related to the other path), raise ValueError.
+
+        The *walk_up* parameter controls whether `..` may be used to resolve
+        the path.
+        """
+        if _deprecated:
+            msg = ("support for supplying more than one positional argument "
+                   "to pathlib.PurePath.relative_to() is deprecated and "
+                   "scheduled for removal in Python 3.14")
+            warnings.warn(msg, DeprecationWarning, stacklevel=2)
+            other = self.with_segments(other, *_deprecated)
+        return _abc.PurePathBase.relative_to(self, other, walk_up=walk_up)
+
+    def is_relative_to(self, other, /, *_deprecated):
+        """Return True if the path is relative to another path or False.
+        """
+        if _deprecated:
+            msg = ("support for supplying more than one argument to "
+                   "pathlib.PurePath.is_relative_to() is deprecated and "
+                   "scheduled for removal in Python 3.14")
+            warnings.warn(msg, DeprecationWarning, stacklevel=2)
+            other = self.with_segments(other, *_deprecated)
+        return _abc.PurePathBase.is_relative_to(self, other)
+
     def as_uri(self):
         """Return the path as a URI."""
         if not self.is_absolute():

Lib/pathlib/_abc.py

@@ -2,7 +2,6 @@ import functools
 import ntpath
 import posixpath
 import sys
-import warnings
 from _collections_abc import Sequence
 from errno import ENOENT, ENOTDIR, EBADF, ELOOP, EINVAL
 from itertools import chain
@@ -383,7 +382,7 @@ class PurePathBase:
         else:
             raise ValueError(f"Invalid suffix {suffix!r}")
 
-    def relative_to(self, other, /, *_deprecated, walk_up=False):
+    def relative_to(self, other, *, walk_up=False):
         """Return the relative path to another path identified by the passed
         arguments.  If the operation is not possible (because this is not
         related to the other path), raise ValueError.
@@ -391,13 +390,7 @@ class PurePathBase:
         The *walk_up* parameter controls whether `..` may be used to resolve
         the path.
         """
-        if _deprecated:
+        if not isinstance(other, PurePathBase):
-            msg = ("support for supplying more than one positional argument "
-                   "to pathlib.PurePath.relative_to() is deprecated and "
-                   "scheduled for removal in Python 3.14")
-            warnings.warn(msg, DeprecationWarning, stacklevel=2)
-            other = self.with_segments(other, *_deprecated)
-        elif not isinstance(other, PurePathBase):
             other = self.with_segments(other)
         for step, path in enumerate(chain([other], other.parents)):
             if path == self or path in self.parents:
@@ -411,16 +404,10 @@ class PurePathBase:
         parts = ['..'] * step + self._tail[len(path._tail):]
         return self._from_parsed_parts('', '', parts)
 
-    def is_relative_to(self, other, /, *_deprecated):
+    def is_relative_to(self, other):
         """Return True if the path is relative to another path or False.
         """
-        if _deprecated:
+        if not isinstance(other, PurePathBase):
-            msg = ("support for supplying more than one argument to "
-                   "pathlib.PurePath.is_relative_to() is deprecated and "
-                   "scheduled for removal in Python 3.14")
-            warnings.warn(msg, DeprecationWarning, stacklevel=2)
-            other = self.with_segments(other, *_deprecated)
-        elif not isinstance(other, PurePathBase):
             other = self.with_segments(other)
         return other == self or other in self.parents
 

Lib/test/test_pathlib/test_pathlib.py

@@ -214,6 +214,19 @@ class PurePathTest(test_pathlib_abc.DummyPurePathTest):
                 self.assertEqual(q, p)
                 self.assertEqual(repr(q), r)
 
+    def test_relative_to_several_args(self):
+        P = self.cls
+        p = P('a/b')
+        with self.assertWarns(DeprecationWarning):
+            p.relative_to('a', 'b')
+            p.relative_to('a', 'b', walk_up=True)
+
+    def test_is_relative_to_several_args(self):
+        P = self.cls
+        p = P('a/b')
+        with self.assertWarns(DeprecationWarning):
+            p.is_relative_to('a', 'b')
+
 
 class PurePosixPathTest(PurePathTest):
     cls = pathlib.PurePosixPath

Lib/test/test_pathlib/test_pathlib_abc.py

@@ -542,10 +542,6 @@ class DummyPurePathTest(unittest.TestCase):
         self.assertEqual(p.relative_to('a/b/c', walk_up=True), P('..'))
         self.assertEqual(p.relative_to(P('c'), walk_up=True), P('../a/b'))
         self.assertEqual(p.relative_to('c', walk_up=True), P('../a/b'))
-        # With several args.
-        with self.assertWarns(DeprecationWarning):
-            p.relative_to('a', 'b')
-            p.relative_to('a', 'b', walk_up=True)
         # Unrelated paths.
         self.assertRaises(ValueError, p.relative_to, P('c'))
         self.assertRaises(ValueError, p.relative_to, P('a/b/c'))
@@ -607,9 +603,6 @@ class DummyPurePathTest(unittest.TestCase):
         self.assertTrue(p.is_relative_to('a/'))
         self.assertTrue(p.is_relative_to(P('a/b')))
         self.assertTrue(p.is_relative_to('a/b'))
-        # With several args.
-        with self.assertWarns(DeprecationWarning):
-            p.is_relative_to('a', 'b')
         # Unrelated paths.
         self.assertFalse(p.is_relative_to(P('c')))
         self.assertFalse(p.is_relative_to(P('a/b/c')))

Misc/NEWS.d/next/Library/2024-01-05-21-52-59.gh-issue-113568._0FkpZ.rst

@@ -0,0 +1,2 @@
+Raise deprecation warnings from :class:`pathlib.PurePath` and not its
+private base class ``PurePathBase``.