python 库流式输出

from openai import OpenAI


client = OpenAI(
    base_url="https://www.aipro2.com/v1",
    api_key="sk-xxxx"
)
stream = client.chat.completions.create(
    model="gpt-4o-mini",
    messages=[{"role": "user", "content": "Say this is a test"}],
    stream=True,
)
for chunk in stream:
    if chunk.choices[0].delta.content is not None:
        print(chunk.choices[0].delta.content, end="")