Update app.py

app.py

@@ -24,6 +24,9 @@ def get_y(r):
     number = ''.join(filter(str.isdigit, str(r)))
     return train_y[int(number)]
 
+def persistent_load(persid):
+    return None
+
 
 with open('collaborativefiltering.pkl', 'rb') as f:
     learn = pickle.load(f)