fix role maker return none

python/paddle/distributed/fleet/__init__.py

@@ -29,6 +29,7 @@ __all__ = [
 ]
 
 fleet = Fleet()
+_role_maker_ = fleet._role_maker_
 init = fleet.init
 is_first_worker = fleet.is_first_worker
 worker_index = fleet.worker_index

python/paddle/distributed/fleet/base/fleet_base.py

@@ -189,6 +189,9 @@ class Fleet(object):
                 paddle.distributed.init_parallel_env()
         return None
 
+    def _role_maker_(self):
+        return self._role_maker
+
     def is_first_worker(self):
         """
         Check whether the node is the first instance of worker.