From 256e1ee4712c22ad9c52d0cba3eb7f3d93952974 Mon Sep 17 00:00:00 2001
From: barneygale <barney.gale@gmail.com>
Date: Thu, 25 May 2023 23:04:44 +0100
Subject: [PATCH] GH-104947: Make pathlib.PureWindowsPath comparisons
 consistent across OSs

Use `str.lower()` rather than `ntpath.normcase()` to normalize case of
Windows paths. This restores behaviour from Python 3.11.
---
 Lib/pathlib.py                                               | 5 ++++-
 .../Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst   | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst

diff --git a/Lib/pathlib.py b/Lib/pathlib.py
index fb78939dcc31ba..c8931687a3c6dc 100644
--- a/Lib/pathlib.py
+++ b/Lib/pathlib.py
@@ -421,7 +421,10 @@ def _str_normcase(self):
         try:
             return self._str_normcase_cached
         except AttributeError:
-            self._str_normcase_cached = self._flavour.normcase(str(self))
+            if _is_case_sensitive(self._flavour):
+                self._str_normcase_cached = str(self)
+            else:
+                self._str_normcase_cached = str(self).lower()
             return self._str_normcase_cached
 
     @property
diff --git a/Misc/NEWS.d/next/Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst b/Misc/NEWS.d/next/Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst
new file mode 100644
index 00000000000000..778b305aae4560
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst
@@ -0,0 +1,2 @@
+Make comparisons between :class:`pathlib.PureWindowsPath` objects consistent
+across Windows and Posix.