https://github.com/python/cpython/commit/a199ab3f333a2e0bab37db935030f835c0740d08
commit: a199ab3f333a2e0bab37db935030f835c0740d08
branch: 3.12
author: Miss Islington (bot) <[email protected]>
committer: barneygale <[email protected]>
date: 2024-01-23T01:12:59Z
summary:

[3.12] GH-99334: Explain that `PurePath.is_relative_to()` is purely lexical. 
(GH-114031) (#114460)

(cherry picked from commit 3a61d24062aaa1e13ba794360b6c765d9a1f2b06)

files:
M Doc/library/pathlib.rst

diff --git a/Doc/library/pathlib.rst b/Doc/library/pathlib.rst
index 46a4d10b11d602..701131b5b2ec46 100644
--- a/Doc/library/pathlib.rst
+++ b/Doc/library/pathlib.rst
@@ -509,6 +509,13 @@ Pure paths provide the following methods and properties:
       >>> p.is_relative_to('/usr')
       False
 
+   This method is string-based; it neither accesses the filesystem nor treats
+   "``..``" segments specially. The following code is equivalent:
+
+      >>> u = PurePath('/usr')
+      >>> u == p or u in p.parents
+      False
+
    .. versionadded:: 3.9
 
    .. deprecated-removed:: 3.12 3.14

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