Update app.py

app.py

@@ -369,7 +369,7 @@ class ConversationBot:
                              #"The input to this tool should be a comma seperated string of two, representing the image_path and the user description")]
         ]
 
-    def init_langchain(api_key):
+    def init_langchain(self,api_key):
         self.llm = OpenAI(temperature = 0, openai_api_key = api_key)
         self.agent = initialize_agent(
             self.tools,