from langchain_openai import ChatOpenAI
import os

# 获取 API Key
OPENAI_API_KEY = “sk-dajgsdlaf.....................”
API_BASE = “https://free.v36.cm”

llm = ChatOpenAI(model="gpt-3.5-turbo", api_key=OPENAI_API_KEY, base_url= API_BASE,temperature=0)

input_text = ["你好"]
response = llm.invoke(input_text)
print(response)

上面是代码 
下面是报错，怎么回事 
  AttributeError: 'str' object has no attribute 'model_dump'...