From 1b486cc2630bd2d1e098ae5632ed4b3c42a74448 Mon Sep 17 00:00:00 2001
From: Amin Alaee <mohammadamin.alaee@gmail.com>
Date: Thu, 6 Aug 2026 09:11:31 +0200
Subject: [PATCH 1/2] Update copy.deepcopy signature for Python 3.15

---
 stdlib/@tests/stubtest_allowlists/py315.txt | 1 -
 stdlib/copy.pyi                             | 8 ++++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/stdlib/@tests/stubtest_allowlists/py315.txt b/stdlib/@tests/stubtest_allowlists/py315.txt
index 7354dac4dc90..e99551a48ae0 100644
--- a/stdlib/@tests/stubtest_allowlists/py315.txt
+++ b/stdlib/@tests/stubtest_allowlists/py315.txt
@@ -17,7 +17,6 @@ _struct.pack
 _struct.pack_into
 _thread.RLock.__exit__
 _thread.lock.__exit__
-copy.deepcopy
 dataclasses.MISSING
 dataclasses._MISSING_TYPE
 dataclasses.field
diff --git a/stdlib/copy.pyi b/stdlib/copy.pyi
index 373899ea2635..27927c0c78f5 100644
--- a/stdlib/copy.pyi
+++ b/stdlib/copy.pyi
@@ -14,10 +14,14 @@ class _SupportsReplace(Protocol[_RT_co]):
 # None in CPython but non-None in Jython
 PyStringMap: Any
 
-# Note: memo and _nil are internal kwargs.
-def deepcopy(x: _T, memo: dict[int, Any] | None = None, _nil: Any = []) -> _T: ...
 def copy(x: _T) -> _T: ...
 
+if sys.version_info >= (3, 15):
+    def deepcopy(x: _T, memo: dict[int, Any] | None = None) -> _T: ...
+else:
+    # Note: memo and _nil are internal kwargs.
+    def deepcopy(x: _T, memo: dict[int, Any] | None = None, _nil: Any = []) -> _T: ...
+
 if sys.version_info >= (3, 13):
     __all__ += ["replace"]
     # The types accepted by `**changes` match those of `obj.__replace__`.

From bff71af35161694b4823547340ed3b7cd2603fd0 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Thu, 6 Aug 2026 07:14:04 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

---
 stdlib/copy.pyi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stdlib/copy.pyi b/stdlib/copy.pyi
index 27927c0c78f5..925bed1aada2 100644
--- a/stdlib/copy.pyi
+++ b/stdlib/copy.pyi
@@ -18,6 +18,7 @@ def copy(x: _T) -> _T: ...
 
 if sys.version_info >= (3, 15):
     def deepcopy(x: _T, memo: dict[int, Any] | None = None) -> _T: ...
+
 else:
     # Note: memo and _nil are internal kwargs.
     def deepcopy(x: _T, memo: dict[int, Any] | None = None, _nil: Any = []) -> _T: ...