Update app.py

app.py

@@ -102,7 +102,8 @@ def train_model():
 ### -------------------------------- ###
 
 try:
-  model = pkl.load('model.pkl')
+  with open('model.pkl', 'r') as f:
+    model = pkl.load(f)
 except FileNotFoundError as e:
   load_dataset()
   train_model()