Update app.py

app.py

@@ -50,8 +50,6 @@ class ChatBot:
     def teach_response(self, user_input, response):
         # Add the new question-response pair to the knowledge base
         new_question = {'question': user_input.lower(), 'response': response}
-        if 'questions' not in self.knowledge_base:
-            self.knowledge_base['questions'] = []
         self.knowledge_base['questions'].append(new_question)
 
 if __name__ == "__main__":