merge 3.3 (#16345)
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commit
7503e08588
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@ -256,6 +256,14 @@ class DictTest(unittest.TestCase):
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d = dict(zip(range(6), range(6)))
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self.assertEqual(dict.fromkeys(d, 0), dict(zip(range(6), [0]*6)))
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class baddict3(dict):
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def __new__(cls):
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return d
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d = {i : i for i in range(10)}
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res = d.copy()
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res.update(a=None, b=None, c=None)
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self.assertEqual(baddict3.fromkeys({"a", "b", "c"}), res)
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def test_copy(self):
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d = {1:1, 2:2, 3:3}
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self.assertEqual(d.copy(), {1:1, 2:2, 3:3})
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@ -21,6 +21,9 @@ Core and Builtins
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- Issue #14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patch
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written by Serhiy Storchaka.
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- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass
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recieved a nonempty dict from the constructor.
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- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a
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class's __dict__ and on type.
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@ -1707,7 +1707,8 @@ dict_fromkeys(PyObject *cls, PyObject *args)
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if (d == NULL)
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return NULL;
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if (PyDict_CheckExact(d) && PyDict_CheckExact(seq)) {
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if (PyDict_CheckExact(d) && PyDict_Size(d) == 0) {
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if (PyDict_CheckExact(seq)) {
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PyDictObject *mp = (PyDictObject *)d;
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PyObject *oldvalue;
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Py_ssize_t pos = 0;
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@ -1727,8 +1728,7 @@ dict_fromkeys(PyObject *cls, PyObject *args)
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}
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return d;
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}
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if (PyDict_CheckExact(d) && PyAnySet_CheckExact(seq)) {
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if (PyAnySet_CheckExact(seq)) {
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PyDictObject *mp = (PyDictObject *)d;
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Py_ssize_t pos = 0;
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PyObject *key;
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@ -1747,6 +1747,7 @@ dict_fromkeys(PyObject *cls, PyObject *args)
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}
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return d;
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}
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}
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it = PyObject_GetIter(seq);
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if (it == NULL){
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