OpenAI 调用ragflow本地api

from openai import OpenAI

model = "model"  # 选择聊天模型
client = OpenAI(
    api_key="ragflow-BkYjY0MWU0MTAzMjExZjA5MjNjMDI0Mm", 
    base_url=f"http://localhost/api/v1/chats_openai/a371c300102f11d0b19e0242ac140326"
)

completion = client.chat.completions.create(
    model=model,
    messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "你是谁"},
    ],
    stream=True 
)

stream = True
if stream:
    for chunk in completion:
        print(chunk)
else:
    print(completion.choices[0].message.content)