fix code style

paddle/fluid/train/custom_trainer/feed/scripts/join.py

@@ -50,7 +50,14 @@ def inference():
         { "name": "epoch_auc", "class": "AucMonitor", "target": ctr_output, "compute_interval": 600 },
         { "name": "day_auc", "class": "AucMonitor", "target": ctr_output, "compute_interval": 86400 }
     ]
-    return {'accessors': accessors, 'monitors': monitors, 'sparses': [sparse_cvm], 'inputs': [cvm_input], 'outputs': [ctr_output]}
+    
+    return {
+        'accessors': accessors, 
+        'monitors': monitors, 
+        'sparses': [sparse_cvm], 
+        'inputs': [cvm_input], 
+        'outputs': [ctr_output]
+    }
 
 def loss_function(ctr_output):
     """

paddle/fluid/train/custom_trainer/feed/scripts/update.py

@@ -43,7 +43,13 @@ def inference():
         { "name": "day_auc", "class": "AucMonitor", "target": ctr_output, "compute_interval": 86400 }
     ]
 
-    return {'accessors': accessors, 'monitors': monitors, 'sparses': [sparse_cvm], 'inputs': [cvm_input], 'outputs': [ctr_output]}
+    return {
+        'accessors': accessors, 
+        'monitors': monitors, 
+        'sparses': [sparse_cvm], 
+        'inputs': [cvm_input], 
+        'outputs': [ctr_output]
+    }
 
 def loss_function(ctr_output):
     """