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gh-116946: add Py_TPFLAGS_IMMUTABLETYPE to _random.Random #138341

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Merged
merged 3 commits into from
Sep 3, 2025
+10 −5
Merged

gh-116946: add Py_TPFLAGS_IMMUTABLETYPE to _random.Random #138341

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2f6c5aa
fully implement GC protocol for `random.Random`
picnixz Sep 1, 2025
488be06
make random.Random immutable instead of supporting full GC
picnixz Sep 2, 2025
2068b50
blurb
picnixz Sep 2, 2025
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2025-09-02-10-23-09.gh-issue-116946.U6RpwK.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
The :class:`!_random.Random` C type is now immutable. Patch by Bénédikt
Tran.
13 changes: 8 additions & 5 deletions Modules/_randommodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -595,11 +595,14 @@ static PyType_Slot Random_Type_slots[] = {
};

static PyType_Spec Random_Type_spec = {
"_random.Random",
sizeof(RandomObject),
0,
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
Random_Type_slots
.name = "_random.Random",
.basicsize = sizeof(RandomObject),
.flags = (
Py_TPFLAGS_DEFAULT
| Py_TPFLAGS_BASETYPE
| Py_TPFLAGS_IMMUTABLETYPE
),
.slots = Random_Type_slots
};

PyDoc_STRVAR(module_doc,
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