Update app.py

app.py

@@ -44,23 +44,26 @@ def bag_of_words(s, words):
     return np.array(bag)
 
 
-def chat(message, history):
-    history = history or []
+def chat(message, history=None):
+    if history is None:
+        history = []
     message = message.lower()
     results = model.predict([bag_of_words(message, words)])
     results_index = np.argmax(results)
     tag = labels[results_index]
 
     for tg in data["intents"]:
-      if tg['tag'] == tag:
-        responses = tg['responses']
+        if tg['tag'] == tag:
+            responses = tg['responses']
+            response = random.choice(responses)
+            break
+    else:
+        response = "Sorry, I didn't understand that."
 
-        # print(random.choice(responses))
-        response = random.choice(responses)
-  
     history.append((message, response))
     return history, history
 
+
 chatbot = gr.Chatbot(label="Chat")
 css = """
 footer {display:none !important}