From 78a368ac65081316376258cbe64db6d9795ef14a Mon Sep 17 00:00:00 2001
From: barneygale <barney.gale@gmail.com>
Date: Fri, 16 May 2025 19:05:46 +0100
Subject: [PATCH 1/2] GH-128520: pathlib ABCs: tweak protocol for virtual path
 strings

Adjust `pathlib._os.vfspath()` so that it doesn't try `os.fsdecode()`. I
don't know whether supporting `os.PathLike` arguments is a good idea, so
it's best to leave it out for now.
---
 Lib/pathlib/__init__.py                   |  6 +++---
 Lib/pathlib/_os.py                        | 16 +++++-----------
 Lib/test/test_pathlib/support/zip_path.py |  2 +-
 3 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/Lib/pathlib/__init__.py b/Lib/pathlib/__init__.py
index 2dc1f7f7126063..2b09f31661c1ef 100644
--- a/Lib/pathlib/__init__.py
+++ b/Lib/pathlib/__init__.py
@@ -188,9 +188,6 @@ def __reduce__(self):
     def __repr__(self):
         return "{}({!r})".format(self.__class__.__name__, self.as_posix())
 
-    def __fspath__(self):
-        return str(self)
-
     def __bytes__(self):
         """Return the bytes representation of the path.  This is only
         recommended to use under Unix."""
@@ -259,6 +256,9 @@ def __str__(self):
                                                   self._tail) or '.'
             return self._str
 
+    __fspath__ = __str__
+    __vfspath__ = __str__
+
     @classmethod
     def _format_parsed_parts(cls, drv, root, tail):
         if drv or root:
diff --git a/Lib/pathlib/_os.py b/Lib/pathlib/_os.py
index 62a4adb555ea89..e61f29543b868a 100644
--- a/Lib/pathlib/_os.py
+++ b/Lib/pathlib/_os.py
@@ -210,24 +210,18 @@ def magic_open(path, mode='r', buffering=-1, encoding=None, errors=None,
     raise TypeError(f"{cls.__name__} can't be opened with mode {mode!r}")
 
 
-def vfspath(path):
+def vfspath(obj):
     """
     Return the string representation of a virtual path object.
     """
+    cls = type(obj)
     try:
-        return os.fsdecode(path)
-    except TypeError:
-        pass
-
-    path_type = type(path)
-    try:
-        return path_type.__vfspath__(path)
+        return cls.__vfspath__(obj)
     except AttributeError:
-        if hasattr(path_type, '__vfspath__'):
+        if hasattr(cls, '__vfspath__'):
             raise
 
-    raise TypeError("expected str, bytes, os.PathLike or JoinablePath "
-                    "object, not " + path_type.__name__)
+    raise TypeError("expected JoinablePath object, not " + cls.__name__)
 
 
 def ensure_distinct_paths(source, target):
diff --git a/Lib/test/test_pathlib/support/zip_path.py b/Lib/test/test_pathlib/support/zip_path.py
index 21e1d07423aff5..2bfe89b36595b0 100644
--- a/Lib/test/test_pathlib/support/zip_path.py
+++ b/Lib/test/test_pathlib/support/zip_path.py
@@ -334,4 +334,4 @@ def symlink_to(self, target, target_is_directory=False):
         zinfo.external_attr = stat.S_IFLNK << 16
         if target_is_directory:
             zinfo.external_attr |= 0x10
-        self.zip_file.writestr(zinfo, vfspath(target))
+        self.zip_file.writestr(zinfo, target)

From 5bb6bb25f42ba71d8edc04d2eb49ca34b8816d93 Mon Sep 17 00:00:00 2001
From: barneygale <barney.gale@gmail.com>
Date: Sun, 20 Jul 2025 18:12:03 +0100
Subject: [PATCH 2/2] Match implementation in #134101

---
 Lib/pathlib/_os.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/Lib/pathlib/_os.py b/Lib/pathlib/_os.py
index e61f29543b868a..fbcbfb979d1278 100644
--- a/Lib/pathlib/_os.py
+++ b/Lib/pathlib/_os.py
@@ -216,12 +216,12 @@ def vfspath(obj):
     """
     cls = type(obj)
     try:
-        return cls.__vfspath__(obj)
+        vfspath_method = cls.__vfspath__
     except AttributeError:
-        if hasattr(cls, '__vfspath__'):
-            raise
-
-    raise TypeError("expected JoinablePath object, not " + cls.__name__)
+        cls_name = cls.__name__
+        raise TypeError(f"expected JoinablePath object, not {cls_name}") from None
+    else:
+        return vfspath_method(obj)
 
 
 def ensure_distinct_paths(source, target):