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- Patch 1433928:

Browse source 
- The copy module now "copies" function objects (as atomic objects).
  - dict.__getitem__ now looks for a __missing__ hook before raising
    KeyError.
  - Added a new type, defaultdict, to the collections module.
    This uses the new __missing__ hook behavior added to dict (see above).
This commit is contained in:
Guido van Rossum 2006-02-25 22:38:04 +00:00
parent ab51f5f24d
commit 1968ad32cd
12 changed files with 611 additions and 10 deletions
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16
Objects/dictobject.c
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@ -882,8 +882,22 @@ dict_subscript(dictobject *mp, register PyObject *key)
return NULL;
}
v = (mp->ma_lookup)(mp, key, hash) -> me_value;
if (v == NULL)
if (v == NULL) {
if (!PyDict_CheckExact(mp)) {
/* Look up __missing__ method if we're a subclass. */
static PyObject *missing_str = NULL;
if (missing_str == NULL)
missing_str =
PyString_InternFromString("__missing__");
PyObject *missing = _PyType_Lookup(mp->ob_type,
missing_str);
if (missing != NULL)
return PyObject_CallFunctionObjArgs(missing,
(PyObject *)mp, key, NULL);
}
PyErr_SetObject(PyExc_KeyError, key);
return NULL;
}
else
Py_INCREF(v);
return v;