Update app.py

app.py

@@ -37,16 +37,20 @@ class FalconChatBot:
         self.system_prompt = system_prompt
 
     def process_history(self, history):
+        if history is None:
+            return []
+    
         # Filter out special commands from the history
         filtered_history = []
         for message in history:
             user_message = message["user"]
             assistant_message = message["assistant"]
-            # Check if the user_message is not a special command
+        # Check if the user_message is not a special command
             if not user_message.startswith("Falcon:"):
                 filtered_history.append({"user": user_message, "assistant": assistant_message})
         return filtered_history
 
+
     def predict(self, system_prompt, user_message, assistant_message, history, max_length=500):
         # Process the history to remove special commands
         processed_history = self.process_history(history)