From 7147657734336170aa620f7c926aaae2cbf40c16 Mon Sep 17 00:00:00 2001
From: "Gregory P. Smith" <greg@krypto.org>
Date: Sun, 16 Feb 2025 10:40:08 -0800
Subject: [PATCH] gh-118761: Revert "Improve import time of `subprocess`
 (GH-129427)" (GH-130201)
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* Revert "gh-118761: Improve import time of `subprocess` (GH-129427)"

This reverts commit 49f24650e4541456872490ec2b59d6d186204891.
Also known as f502c8f6a6db4be27c97a0e5466383d117859b7f in 3.13 (PR GH-129447)
Also known as f65aa0d1bf7b636ab8f9d226429205854b24cd7a in 3.12 (PR GH-129448)

This caused bugs in the `__del__` finalizer:
 https://github.com/python/cpython/issues/118761#issuecomment-2661504264

---------
(cherry picked from commit ae3064608935367c860182dc1b364631082ecdff)

Co-authored-by: Gregory P. Smith <greg@krypto.org>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
---
 Lib/subprocess.py                                | 16 ++--------------
 ...025-02-16-10-12-27.gh-issue-118761.TNw5ZC.rst |  4 ++++
 2 files changed, 6 insertions(+), 14 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2025-02-16-10-12-27.gh-issue-118761.TNw5ZC.rst

diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index 3ec39ca3e61e7a..881a9ce800ae99 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -43,8 +43,10 @@
 import builtins
 import errno
 import io
+import locale
 import os
 import time
+import signal
 import sys
 import threading
 import warnings
@@ -136,8 +138,6 @@ def __init__(self, returncode, cmd, output=None, stderr=None):
 
     def __str__(self):
         if self.returncode and self.returncode < 0:
-            # Lazy import to improve module import time
-            import signal
             try:
                 return "Command '%s' died with %r." % (
                         self.cmd, signal.Signals(-self.returncode))
@@ -375,8 +375,6 @@ def _text_encoding():
     if sys.flags.utf8_mode:
         return "utf-8"
     else:
-        # Lazy import to improve module import time
-        import locale
         return locale.getencoding()
 
 
@@ -1657,9 +1655,6 @@ def send_signal(self, sig):
             # Don't signal a process that we know has already died.
             if self.returncode is not None:
                 return
-
-            # Lazy import to improve module import time
-            import signal
             if sig == signal.SIGTERM:
                 self.terminate()
             elif sig == signal.CTRL_C_EVENT:
@@ -1764,9 +1759,6 @@ def _posix_spawn(self, args, executable, env, restore_signals,
 
             kwargs = {}
             if restore_signals:
-                # Lazy import to improve module import time
-                import signal
-
                 # See _Py_RestoreSignals() in Python/pylifecycle.c
                 sigset = []
                 for signame in ('SIGPIPE', 'SIGXFZ', 'SIGXFSZ'):
@@ -2216,13 +2208,9 @@ def send_signal(self, sig):
         def terminate(self):
             """Terminate the process with SIGTERM
             """
-            # Lazy import to improve module import time
-            import signal
             self.send_signal(signal.SIGTERM)
 
         def kill(self):
             """Kill the process with SIGKILL
             """
-            # Lazy import to improve module import time
-            import signal
             self.send_signal(signal.SIGKILL)
diff --git a/Misc/NEWS.d/next/Library/2025-02-16-10-12-27.gh-issue-118761.TNw5ZC.rst b/Misc/NEWS.d/next/Library/2025-02-16-10-12-27.gh-issue-118761.TNw5ZC.rst
new file mode 100644
index 00000000000000..198fd0c28f4f3c
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-02-16-10-12-27.gh-issue-118761.TNw5ZC.rst
@@ -0,0 +1,4 @@
+Reverts a change in the previous release attempting to make some stdlib
+imports used within the :mod:`subprocess` module lazy as this was causing
+errors during ``__del__`` finalizers calling methods such as ``terminate``, or
+``kill``, or ``send_signal``.