diff --git a/models/model_irse_DRL.py b/models/model_irse_DRL.py
index 557b025eb..d29889045 100644
--- a/models/model_irse_DRL.py
+++ b/models/model_irse_DRL.py
@@ -71,15 +71,14 @@ def forward(self, x):  # pylint: disable=arguments-differ
         return x
 
 
-
 class Ensemble(nn.Module):
     """
     Ensemble of Teacher and DRL
     """
-    def __init__(self, resnet, DRL):
+    def __init__(self, resnet, drl):
         super().__init__()
         self.resnet = resnet
-        self.DRL = DRL
+        self.DRL = drl
         self.Teacher_mode = False
 
     def forward(self, x):
@@ -99,16 +98,15 @@ def forward(self, x):
 
 class Flatten(nn.Module):
     """Flattens the input"""
-    def forward(self, input):
+    def forward(self, x):
         """Forward prop"""
-        return input.view(input.size(0), -1) # pylint: disable=redefined-builtin
+        return x.view(x.size(0), -1)
 
 
-def l2_norm(input, axis=1):
+def l2_norm(x, axis=1):
     """l2 norm"""
-    norm = torch.norm(input, 2, axis, True)
-    output = torch.div(input, norm)
-
+    norm = torch.norm(x, 2, axis, True)
+    output = torch.div(x, norm)
     return output
 
 
diff --git a/train.py b/train.py
index 4440a3e7c..fc761abec 100644
--- a/train.py
+++ b/train.py
@@ -1010,7 +1010,7 @@ def scaf_test(val_loader, model, accuracy_calculator):
     accuracies = accuracy_calculator.get_accuracy(
         test_embeddings, test_embeddings, test_labels, test_labels, True
     )
-    msglogger.info(f"Test set accuracy (Precision@1) = {accuracies['precision_at_1']}")
+    msglogger.info('Test set accuracy (Precision@1) = %f', accuracies['precision_at_1'])
     return accuracies["precision_at_1"], 0 , 0 , 0
 
 def validate(val_loader, model, criterion, loggers, args, epoch=-1, tflogger=None):