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bpo-42008: Fix internal _random.Random() seeding for the one argument case (GH-22668)

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AMIR 2020-12-22 03:15:50 +03:30 committed by GitHub
parent 711381dfb0
commit b8fde8b541
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3 changed files with 22 additions and 1 deletions
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9
Lib/test/test_random.py
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@ -414,6 +414,15 @@ class TestBasicOps:
r = _random.Random()
self.assertRaises(TypeError, pickle.dumps, r, proto)
@test.support.cpython_only
def test_bug_42008(self):
# _random.Random should call seed with first element of arg tuple
import _random
r1 = _random.Random()
r1.seed(8675309)
r2 = _random.Random(8675309)
self.assertEqual(r1.random(), r2.random())
def test_bug_1727780(self):
# verify that version-2-pickles can be loaded
# fine, whether they are created on 32-bit or 64-bit

1
Misc/NEWS.d/next/Core and Builtins/2020-10-12-14-51-59.bpo-42008.ijWw2I.rst Normal file
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@ -0,0 +1 @@
Fix _random.Random() seeding.

13
Modules/_randommodule.c
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@ -519,6 +519,7 @@ random_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
RandomObject *self;
PyObject *tmp;
PyObject *arg = NULL;
_randomstate *state = _randomstate_type(type);
if (type == (PyTypeObject*)state->Random_Type &&
@ -529,12 +530,22 @@ random_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
self = (RandomObject *)PyType_GenericAlloc(type, 0);
if (self == NULL)
return NULL;
tmp = random_seed(self, args);
if (PyTuple_GET_SIZE(args) > 1) {
PyErr_SetString(PyExc_TypeError, "Random() requires 0 or 1 argument");
return NULL;
}
if (PyTuple_GET_SIZE(args) == 1)
arg = PyTuple_GET_ITEM(args, 0);
tmp = random_seed(self, arg);
if (tmp == NULL) {
Py_DECREF(self);
return NULL;
}
Py_DECREF(tmp);
return (PyObject *)self;
}