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[stdlib] Update copy.deepcopy signature for Python 3.15 #16147

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Merged
srittau merged 3 commits into from
Aug 6, 2026
+7 −3
Merged

[stdlib] Update copy.deepcopy signature for Python 3.15 #16147

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1b486cc
Update copy.deepcopy signature for Python 3.15
aminalaee Aug 6, 2026
bff71af
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Aug 6, 2026
6f75f32
Merge branch 'main' into copy-deepcopy-py315
srittau Aug 6, 2026
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1 change: 0 additions & 1 deletion stdlib/@tests/stubtest_allowlists/py315.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,6 @@ _struct.pack
_struct.pack_into
_thread.RLock.__exit__
_thread.lock.__exit__
copy.deepcopy
dataclasses.MISSING
dataclasses._MISSING_TYPE
dataclasses.field
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9 changes: 7 additions & 2 deletions stdlib/copy.pyi
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Expand Up @@ -14,10 +14,15 @@ 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__`.
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