py/objtuple: Allow to use inplace-multiplication operator on tuples.

py/objtuple.c

@@ -148,7 +148,8 @@ mp_obj_t mp_obj_tuple_binary_op(mp_uint_t op, mp_obj_t lhs, mp_obj_t rhs) {
             mp_seq_cat(s->items, o->items, o->len, p->items, p->len, mp_obj_t);
             return MP_OBJ_FROM_PTR(s);
         }
-        case MP_BINARY_OP_MULTIPLY: {
+        case MP_BINARY_OP_MULTIPLY:
+        case MP_BINARY_OP_INPLACE_MULTIPLY: {
             mp_int_t n;
             if (!mp_obj_get_int_maybe(rhs, &n)) {
                 return MP_OBJ_NULL; // op not supported

tests/basics/tuple_mult.py

@@ -11,6 +11,11 @@ a = (1, 2, 3)
 c = a * 3
 print(a, c)
 
+# inplace multiplication
+a = (1, 2)
+a *= 2
+print(a)
+
 # unsupported type on RHS
 try:
     () * None