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py/objmodule: Implement PEP 562's __getattr__ for modules.

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Configurable via MICROPY_MODULE_GETATTR, disabled by default.  Among other
things __getattr__ for modules can help to build lazy loading / code
unloading at runtime.
This commit is contained in:
Paul m. p. P
2018-10-22 18:34:29 +02:00
committed by Damien George
parent a527313382
commit 454cca6016
4 changed files with 36 additions and 0 deletions
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7
py/objmodule.c
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@@ -61,6 +61,13 @@ STATIC void module_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
if (elem != NULL) {
dest[0] = elem->value;
#if MICROPY_MODULE_GETATTR
} else if (attr != MP_QSTR___getattr__) {
elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___getattr__), MP_MAP_LOOKUP);
if (elem != NULL) {
dest[0] = mp_call_function_1(elem->value, MP_OBJ_NEW_QSTR(attr));
}
#endif
}
} else {
// delete/store attribute