OpenAI 介面卡

請確保 OpenAI 函式庫版本為 1.0.0 或更高版本；否則，請參考舊版文件 OpenAI 介面卡(舊版)。

許多人從 OpenAI 開始，但想探索其他模型。LangChain 與眾多模型供應商的整合讓這件事變得容易。雖然 LangChain 有自己的訊息和模型 API，但我們也盡可能讓探索其他模型變得容易，透過公開一個介面卡，將 LangChain 模型調整為 OpenAI API。

目前這僅處理輸出，不傳回其他資訊（token 計數、停止原因等）。

import openai
from langchain_community.adapters import openai as lc_openai

API 參考：openai

chat.completions.create

messages = [{"role": "user", "content": "hi"}]

原始 OpenAI 呼叫

result = openai.chat.completions.create(
    messages=messages, model="gpt-3.5-turbo", temperature=0
)
result.choices[0].message.model_dump()

{'content': 'Hello! How can I assist you today?',
 'role': 'assistant',
 'function_call': None,
 'tool_calls': None}

LangChain OpenAI 封裝器呼叫

lc_result = lc_openai.chat.completions.create(
    messages=messages, model="gpt-3.5-turbo", temperature=0
)

lc_result.choices[0].message  # Attribute access

{'role': 'assistant', 'content': 'Hello! How can I help you today?'}

lc_result["choices"][0]["message"]  # Also compatible with index access

{'role': 'assistant', 'content': 'Hello! How can I help you today?'}

替換模型供應商

lc_result = lc_openai.chat.completions.create(
    messages=messages, model="claude-2", temperature=0, provider="ChatAnthropic"
)
lc_result.choices[0].message

{'role': 'assistant', 'content': 'Hello! How can I assist you today?'}

chat.completions.stream

原始 OpenAI 呼叫

for c in openai.chat.completions.create(
    messages=messages, model="gpt-3.5-turbo", temperature=0, stream=True
):
    print(c.choices[0].delta.model_dump())

{'content': '', 'function_call': None, 'role': 'assistant', 'tool_calls': None}
{'content': 'Hello', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': '!', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': ' How', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': ' can', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': ' I', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': ' assist', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': ' you', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': ' today', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': '?', 'function_call': None, 'role': None, 'tool_calls': None}
{'content': None, 'function_call': None, 'role': None, 'tool_calls': None}

LangChain OpenAI 封裝器呼叫

for c in lc_openai.chat.completions.create(
    messages=messages, model="gpt-3.5-turbo", temperature=0, stream=True
):
    print(c.choices[0].delta)

{'role': 'assistant', 'content': ''}
{'content': 'Hello'}
{'content': '!'}
{'content': ' How'}
{'content': ' can'}
{'content': ' I'}
{'content': ' assist'}
{'content': ' you'}
{'content': ' today'}
{'content': '?'}
{}

替換模型供應商

for c in lc_openai.chat.completions.create(
    messages=messages,
    model="claude-2",
    temperature=0,
    stream=True,
    provider="ChatAnthropic",
):
    print(c["choices"][0]["delta"])

{'role': 'assistant', 'content': ''}
{'content': 'Hello'}
{'content': '!'}
{'content': ' How'}
{'content': ' can'}
{'content': ' I'}
{'content': ' assist'}
{'content': ' you'}
{'content': ' today'}
{'content': '?'}
{}