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SF #1615701: make d.update(m) honor __getitem__() and keys() in dict subclasses

This commit is contained in:
Raymond Hettinger 2007-02-07 20:01:28 +00:00
parent 39e23b2bfa
commit 20dcf1cb9d
2 changed files with 9 additions and 1 deletions
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8
Lib/test/test_dict.py
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@ -189,6 +189,14 @@ class DictTest(unittest.TestCase):
self.assertRaises(ValueError, {}.update, [(1, 2, 3)])
# SF #1615701: make d.update(m) honor __getitem__() and keys() in dict subclasses
class KeyUpperDict(dict):
def __getitem__(self, key):
return key.upper()
d.clear()
d.update(KeyUpperDict.fromkeys('abc'))
self.assertEqual(d, {'a':'A', 'b':'B', 'c':'C'})
def test_fromkeys(self):
self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
d = {}

2
Objects/dictobject.c
View File

@ -1306,7 +1306,7 @@ PyDict_Merge(PyObject *a, PyObject *b, int override)
return -1;
}
mp = (dictobject*)a;
if (PyDict_Check(b)) {
if (PyDict_CheckExact(b)) {
other = (dictobject*)b;
if (other == mp || other->ma_used == 0)
/* a.update(a) or a.update({}); nothing to do */