OpenAI 适配器
请确保OpenAI库的版本为1.0.0或更高；否则，请参考旧版文档OpenAI适配器(旧版)。
很多人开始使用OpenAI，但也想探索其他模型。LangChain与许多模型提供商的集成使得这一点变得容易实现。虽然LangChain有自己的消息和模型API，但我们也通过暴露一个适配器来使LangChain模型适应OpenAI API，从而尽可能轻松地探索其他模型。
目前，这仅处理输出，并不返回其他信息（如标记计数、停止原因等）。
import openai
from langchain_community.adapters import openai as lc_openai
API Reference:openai
chat.completions.create
messages = [{"role": "user", "content": "hi"}]
原始OpenAI调用
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 包装器调用
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?'}
更换模型提供商
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调用
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 包装器调用
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': '?'}
{}
更换模型提供商
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': '?'}
{}