GH-83863: Drop support for using pathlib.Path objects as context managers

[barneygale]

In Python 3.8 and prior, pathlib.Path.__exit__() marked a path as closed; some subsequent attempts to perform I/O would raise an IOError. This functionality was never documented, and had the effect of making Path objects mutable, contrary to PEP 428. In Python 3.9 we made __exit__() a no-op, and in 3.11 __enter__() began raising deprecation warnings. Here we remove both methods.

• Issue: pathlib.Path objects can be used as context managers #83863

[AlexWaygood]

Hooray! Maybe worth an entry in "what's new in 3.13"?

[barneygale]

Thanks Alex!

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x SLES 3.x has failed when building commit 6b1510c.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/540/builds/5391) and take a look at the build logs.
4. Check if the failure is related to this commit (6b1510c) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/540/builds/5391

Failed tests:

• test_threading

Summary of the results of the build (if available):

== Tests result: FAILURE then ENV CHANGED ==

445 tests OK.

10 slowest tests:

• test_concurrent_futures: 2 min 24 sec
• test_tools: 2 min 10 sec
• test_multiprocessing_spawn: 1 min 59 sec
• test_math: 1 min 30 sec
• test_multiprocessing_forkserver: 1 min 22 sec
• test_signal: 1 min 11 sec
• test_multiprocessing_fork: 1 min 5 sec
• test_capi: 1 min 1 sec
• test_gdb: 43.2 sec
• test_io: 36.8 sec

1 test altered the execution environment:
test_socketserver

19 tests skipped:
test.test_asyncio.test_windows_events
test.test_asyncio.test_windows_utils test_devpoll test_ioctl
test_kqueue test_launcher test_msilib test_nis test_peg_generator
test_perf_profiler test_startfile test_tix test_tkinter test_ttk
test_winconsoleio test_winreg test_winsound test_wmi
test_zipfile64

1 re-run test:
test_threading

Total duration: 6 min 41 sec

Click to see traceback logs

remote: Enumerating objects: 26, done.        
remote: Counting objects:   3% (1/26)        
remote: Counting objects:   7% (2/26)        
remote: Counting objects:  11% (3/26)        
remote: Counting objects:  15% (4/26)        
remote: Counting objects:  19% (5/26)        
remote: Counting objects:  23% (6/26)        
remote: Counting objects:  26% (7/26)        
remote: Counting objects:  30% (8/26)        
remote: Counting objects:  34% (9/26)        
remote: Counting objects:  38% (10/26)        
remote: Counting objects:  42% (11/26)        
remote: Counting objects:  46% (12/26)        
remote: Counting objects:  50% (13/26)        
remote: Counting objects:  53% (14/26)        
remote: Counting objects:  57% (15/26)        
remote: Counting objects:  61% (16/26)        
remote: Counting objects:  65% (17/26)        
remote: Counting objects:  69% (18/26)        
remote: Counting objects:  73% (19/26)        
remote: Counting objects:  76% (20/26)        
remote: Counting objects:  80% (21/26)        
remote: Counting objects:  84% (22/26)        
remote: Counting objects:  88% (23/26)        
remote: Counting objects:  92% (24/26)        
remote: Counting objects:  96% (25/26)        
remote: Counting objects: 100% (26/26)        
remote: Counting objects: 100% (26/26), done.        
remote: Compressing objects:  10% (1/10)        
remote: Compressing objects:  20% (2/10)        
remote: Compressing objects:  30% (3/10)        
remote: Compressing objects:  40% (4/10)        
remote: Compressing objects:  50% (5/10)        
remote: Compressing objects:  60% (6/10)        
remote: Compressing objects:  70% (7/10)        
remote: Compressing objects:  80% (8/10)        
remote: Compressing objects:  90% (9/10)        
remote: Compressing objects: 100% (10/10)        
remote: Compressing objects: 100% (10/10), done.        
remote: Total 14 (delta 12), reused 5 (delta 4), pack-reused 0        
From https://github.com/python/cpython
 * branch                  main       -> FETCH_HEAD
Note: switching to '6b1510cf11c16c8e4381810c15ceeda6f89e79f4'.

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Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 6b1510cf11 GH-83863: Drop support for using `pathlib.Path` objects as context managers (GH-104807)
Switched to and reset branch 'main'

./configure: line 8401: -reorder-blocks=ext-tsp: command not found

make: *** [Makefile:2008: buildbottest] Error 3