fix code bug

ppcls/optimizer/__init__.py

@@ -111,7 +111,7 @@ def build_optimizer(config, epochs, step_each_epoch, model_list=None):
                 if optim_scope.endswith("Loss"):
                     # optimizer for loss
                     for m in model_list[i].sublayers(True):
-                        if m.__class_name == optim_scope:
+                        if m.__class__.__name__ == optim_scope:
                             optim_model.append(m)
                 else:
                     # opmizer for module in model, such as backbone, neck, head...