py: Make globals and locals proper dictionary objects.

Finishes addressing issue #424.

In the end this was a very neat refactor that now makes things a lot
more consistent across the py code base.  It allowed some
simplifications in certain places, now that everything is a dict object.

Also converted builtins tables to dictionaries.  This will be useful
when we need to turn builtins into a proper module.

1 files changed, 8 insertions, 6 deletions

diff --git a/py/objmodule.c b/py/objmodule.c
index 783aa8a6fc..df7c991b8c 100644
--- a/py/objmodule.c
+++ b/py/objmodule.c
@@ -86,14 +86,16 @@ mp_obj_t mp_module_get(qstr module_name) {
     // lookup module
     mp_map_elem_t *el = mp_map_lookup(&mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
 
-    // module found, return it
-    if (el != NULL) {
-        return el->value;
+    if (el == NULL) {
+        // module not found, look for builtin module names
+        el = mp_map_lookup((mp_map_t*)&mp_builtin_module_dict_obj.map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
+        if (el == NULL) {
+            return MP_OBJ_NULL;
+        }
     }
 
-    // module not found, look for builtin module names
-    // it will return MP_OBJ_NULL if nothing found
-    return mp_builtin_tables_lookup_module(module_name);
+    // module found, return it
+    return el->value;
 }
 
 void mp_module_register(qstr qstr, mp_obj_t module) {