Update app/backend/approaches/chatreadretrieveread.py

Co-authored-by: Pamela Fox <[email protected]>

Author: srbalakr

app/backend/approaches/chatreadretrieveread.py

@@ -132,7 +132,7 @@ def get_messages_from_history(self, prompt_override, follow_up_questions_prompt,
         #latest conversation
         userContent = history[-1]["user"] + " \nSources:" + sources
         messages.append({"role": self.USER, "content": userContent})
-        token_count = token_count + self.num_tokens_from_messages(messages, self.chatgpt_model)
+        token_count += self.num_tokens_from_messages(messages, self.chatgpt_model)
 
         '''
         Enqueue in reverse order