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Change filtertuple() to use tp_as_sequence->sq_item 

instead of PyTuple_GetItem, so an overwritten __getitem__
in a tuple subclass works. SF bug #665835.
This commit is contained in:
Walter Dörwald 2003-02-10 17:36:40 +00:00
parent 8d326b8581
commit 8dd19321bb
2 changed files with 7 additions and 3 deletions
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3
Lib/test/test_builtin.py
View File

@ -419,7 +419,6 @@ class BuiltinTest(unittest.TestCase):
def test_filter_subclasses(self):
# test, that filter() never returns tuple, str or unicode subclasses
# and that the result always go's through __getitem__
# FIXME: For tuple currently it doesn't go through __getitem__
funcs = (None, lambda x: True)
class tuple2(tuple):
def __getitem__(self, index):
@ -428,7 +427,7 @@ class BuiltinTest(unittest.TestCase):
def __getitem__(self, index):
return 2*str.__getitem__(self, index)
inputs = {
tuple2: {(): (), (1, 2, 3): (1, 2, 3)}, # FIXME
tuple2: {(): (), (1, 2, 3): (2, 4, 6)},
str2: {"": "", "123": "112233"}
}
if have_unicode:

7
Python/bltinmodule.c
View File

@ -1888,8 +1888,13 @@ filtertuple(PyObject *func, PyObject *tuple)
PyObject *item, *good;
int ok;
if ((item = PyTuple_GetItem(tuple, i)) == NULL)
if (tuple->ob_type->tp_as_sequence &&
tuple->ob_type->tp_as_sequence->sq_item) {
item = tuple->ob_type->tp_as_sequence->sq_item(tuple, i);
} else {
PyErr_SetString(PyExc_TypeError, "unsubscriptable object");
goto Fail_1;
}
if (func == Py_None) {
Py_INCREF(item);
good = item;