fix infer bug

ctr/infer.py

@@ -50,7 +50,7 @@ class CTRInferer(object):
             dnn_layer_dims,
             dnn_input_dim,
             lr_input_dim,
-            model_type=args.model_type,
+            model_type=ModelType(args.model_type),
             is_infer=True)
         # load parameter
         logger.info("load model parameters from %s" % param_path)

ctr/network_conf.py

@@ -95,8 +95,9 @@ class CTRmodel(object):
             # use sigmoid function to approximate ctr rate, a float value between 0 and 1.
             act=paddle.activation.Sigmoid())
 
-        self.train_cost = paddle.layer.multi_binary_label_cross_entropy_cost(
-            input=self.output, label=self.click)
+        if not self.is_infer:
+            self.train_cost = paddle.layer.multi_binary_label_cross_entropy_cost(
+                input=self.output, label=self.click)
         return self.output
 
     def _build_regression_model(self, dnn, lr):