@ -279,7 +279,7 @@ class Trainer(object):
exe = executor.Executor(place)
exe.run(self.startup_program)
if self.checkpoint_cfg and self.checkpoint_cfg.load_serial:
if self.checkpoint_cfg and self.checkpoint_cfg.load_serial is not None:
self._load_checkpoint()
if param_path and os.path.isdir(param_path):