Commit 3c014a67 authored by stijn's avatar stijn Committed by Paul Sokolovsky
Browse files

py: Implement __dict__ for instances.

Note that even though wrapped in MICROPY_CPYTHON_COMPAT, it is not
fully compatible because the modifications to the dictionary do not
propagate to the actual instance members.
parent 7281d95a
......@@ -472,7 +472,22 @@ STATIC void mp_obj_instance_load_attr(mp_obj_t self_in, qstr attr, mp_obj_t *des
dest[0] = elem->value;
return;
}
#if MICROPY_CPYTHON_COMPAT
if (attr == MP_QSTR___dict__) {
// Create a new dict with a copy of the instance's map items.
// This creates, unlike CPython, a 'read-only' __dict__: modifying
// it will not result in modifications to the actual instance members.
mp_map_t *map = &self->members;
mp_obj_t attr_dict = mp_obj_new_dict(map->used);
for (mp_uint_t i = 0; i < map->alloc; ++i) {
if (MP_MAP_SLOT_IS_FILLED(map, i)) {
mp_obj_dict_store(attr_dict, map->table[i].key, map->table[i].value);
}
}
dest[0] = attr_dict;
return;
}
#endif
struct class_lookup_data lookup = {
.obj = self,
.attr = attr,
......
......@@ -46,6 +46,7 @@ Q(__locals__)
Q(__main__)
Q(__module__)
Q(__name__)
Q(__dict__)
Q(__hash__)
Q(__next__)
Q(__qualname__)
......
class A:
def __init__(self):
self.a=1
self.b=2
try:
d=A().__dict__
print(d['a'])
print(d['b'])
except AttributeError:
print("SKIP")
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