Implement "from module import *" construct.

py/runtime.c

@@ -1016,6 +1016,17 @@ mp_obj_t rt_import_from(mp_obj_t module, qstr name) {
     return x;
 }
 
+void rt_import_all(mp_obj_t module) {
+    DEBUG_printf("import all %p\n", module);
+
+    mp_map_t *map = mp_obj_module_get_globals(module);
+    for (uint i = 0; i < map->alloc; i++) {
+        if (map->table[i].key != MP_OBJ_NULL) {
+            rt_store_name(MP_OBJ_QSTR_VALUE(map->table[i].key), map->table[i].value);
+        }
+    }
+}
+
 mp_map_t *rt_locals_get(void) {
     return map_locals;
 }

py/runtime.h

@@ -39,6 +39,7 @@ mp_obj_t rt_getiter(mp_obj_t o);
 mp_obj_t rt_iternext(mp_obj_t o);
 mp_obj_t rt_import_name(qstr name, mp_obj_t fromlist, mp_obj_t level);
 mp_obj_t rt_import_from(mp_obj_t module, qstr name);
+void rt_import_all(mp_obj_t module);
 
 struct _mp_map_t;
 struct _mp_map_t *rt_locals_get(void);

py/showbc.c

@@ -390,6 +390,10 @@ void mp_byte_code_print(const byte *ip, int len) {
                 printf("IMPORT_FROM %s", qstr_str(qstr));
                 break;
 
+            case MP_BC_IMPORT_STAR:
+                printf("IMPORT_STAR");
+                break;
+
             default:
                 printf("code %p, byte code 0x%02x not implemented\n", ip, op);
                 assert(0);

py/vm.c

@@ -595,6 +595,10 @@ unwind_return:
                         PUSH(obj1);
                         break;
 
+                    case MP_BC_IMPORT_STAR:
+                        rt_import_all(TOP());
+                        break;
+
                     default:
                         printf("code %p, byte code 0x%02x not implemented\n", ip, op);
                         assert(0);