Embarrassed, i forget to do the type check

python/paddle/trainer/config_parser.py

@@ -2048,6 +2048,7 @@ class ParameterReluLayer(LayerBase):
     def __init__(self, name, inputs, partial_sum=1, **args):
         super(ParameterReluLayer, self).__init__(
             name, self.layer_type, 0, inputs=inputs, **args)
+
         input_layer = self.get_input_layer(0)
         config_assert(len(self.inputs) == 1, "prelu layer has only one input.")
         config_assert(input_layer.size % partial_sum == 0,

python/paddle/trainer_config_helpers/layers.py

@@ -6442,9 +6442,9 @@ def prelu_layer(input,
     """
 
     assert isinstance(input, LayerOutput), 'prelu_layer accepts only one input.'
+
     if not param_attr:
-        param_attr = ParamAttr(initial_mean=0.25,
+        param_attr = ParamAttr(initial_mean=0.25, initial_std=0.0)
-                               initial_std=0.0)
     else:
         assert isinstance(param_attr, ParameterAttribute)