fix no module named paddle.nn.norm error after paddle API update, test=develop (#729)

demo/dygraph/unstructured_pruning/README.md

@@ -36,6 +36,10 @@ paddleslim>=2.1.0
 - 开发可以在初始化`UnstructuredPruner`时，传入自定义的`skip_params_func`，来定义哪些参数不参与剪裁。`skip_params_func`示例代码如下(路径：`paddleslim.dygraph.prune.unstructured_pruner._get_skip_params())`。默认为所有的归一化层的参数不参与剪裁。
 
 ```python
+NORMS_ALL = [ 'BatchNorm', 'GroupNorm', 'LayerNorm', 'SpectralNorm', 'BatchNorm1D',
+    'BatchNorm2D', 'BatchNorm3D', 'InstanceNorm1D', 'InstanceNorm2D',
+    'InstanceNorm3D', 'SyncBatchNorm', 'LocalResponseNorm' ]
+
 def _get_skip_params(model):
     """
     This function is used to check whether the given model's layers are valid to be pruned.
@@ -49,7 +53,7 @@ def _get_skip_params(model):
     """
     skip_params = set()
     for _, sub_layer in model.named_sublayers():
-        if type(sub_layer).__name__.split('.')[-1] in paddle.nn.norm.__all__:
+        if type(sub_layer).__name__.split('.')[-1] in NORMS_ALL:
             skip_params.add(sub_layer.full_name())
     return skip_params
 ```

paddleslim/dygraph/prune/unstructured_pruner.py

@@ -7,6 +7,12 @@ __all__ = ["UnstructuredPruner"]
 
 _logger = get_logger(__name__, level=logging.INFO)
 
+NORMS_ALL = [
+    'BatchNorm', 'GroupNorm', 'LayerNorm', 'SpectralNorm', 'BatchNorm1D',
+    'BatchNorm2D', 'BatchNorm3D', 'InstanceNorm1D', 'InstanceNorm2D',
+    'InstanceNorm3D', 'SyncBatchNorm', 'LocalResponseNorm'
+]
+
 
 class UnstructuredPruner():
     """
@@ -164,8 +170,7 @@ class UnstructuredPruner():
         """
         skip_params = set()
         for _, sub_layer in model.named_sublayers():
-            if type(sub_layer).__name__.split('.')[
-                    -1] in paddle.nn.norm.__all__:
+            if type(sub_layer).__name__.split('.')[-1] in NORMS_ALL:
                 skip_params.add(sub_layer.full_name())
         return skip_params