配景
OpenAI自从23年11月引入后就没有更新过,一直是0.27.0,近期由于项目必要想引入Agently框架,此框架依赖的OpenAI库较新,于是就必要升级OpenAI库。
新升级的OpenAI库版本为:
错误引出
升级完运行下,起首遇到了这个错误404 - {'error': {'code': '404', 'message': 'Resource not found'}},堆栈如下:
错误分析1
可以看出,在使用OpenAIEmbedding在进行向量嵌入时报的错,我们使用的是Azure摆设的OpenAI服务,出现此错误一样平常是由于Azure Endpoint,Deployment,API Version,API Key,Model Version这几项信息中的某一项有问题。断点调试OpenAIEmbedding的URL如下:
- https://openaiquanshi.openai.azure.com//deployments/meeting-embedding/embeddings?api-version=2023-07-01-preview
复制代码 直接用curl向这个URL发送请求,确实报了404:
- ~ % curl -i -X POST -H 'Content-Length:100' 'https://openaiquanshi.openai.azure.com//deployments/meeting-embedding/embeddings?api-version=2023-07-01-preview
- 'HTTP/2 404 content-length: 56content-type: application/jsonapim-request-id: 61063a5d-bb28-4299-a267-a8ddb8de870cstrict-transport-security: max-age=31536000; includeSubDomains; preloadx-content-type-options: nosniffdate: Wed, 17 Jul 2024 01:42:52 GMT{"error":{"code":"404","message": "Resource not found"}}%
复制代码 **真实缘故原由:**openai接口的URL Path存在版本兼容性,v1版本必要在域名后多加一个/openai用于区分azure和openai(如:https://xxx.openai.azure.com/openai),并且这个URL的修改openai库内部会自动完成。但是openai库内部有个逻辑:只有openai_api_base中没有/openai这个串时才会添加。代码如下所示:
- if is_openai_v1():
- # For backwards compatibility. Before openai v1, no distinction was made
- # between azure_endpoint and base_url (openai_api_base).
- openai_api_base = values["openai_api_base"]
- if openai_api_base and values["validate_base_url"]:
- if "/openai" not in openai_api_base:
- values["openai_api_base"] += "/openai"
- warnings.warn(
- "As of openai>=1.0.0, Azure endpoints should be specified via "
- f"the `azure_endpoint` param not `openai_api_base` "
- f"(or alias `base_url`). Updating `openai_api_base` from "
- f"{openai_api_base} to {values['openai_api_base']}."
- )
复制代码 这里有个弊端,由于azure的openai_api_base域名是由客户企业自己命名的,如果客户命名的域名以openai开头(如:https://openaixxx.openai.azure.com),openai库内部的URL拼接逻辑将不会实行到,最终v1+版本的openai库发出的请求却没有在域名后携带/openai, 导致404 Resource Not found。
**解决办法:**模仿上面的方法,写一个函数is_openai_v1提前进行openai库的版本判断和URL修正。
- def is_openai_v1() -> bool:
- from importlib.metadata import version
- from packaging.version import Version, parse
- _version = parse(version("openai"))
- return _version >= Version("1.0.0")
-
- api_base = os.environ["OPENAI_API_BASE"]
-
- if is_openai_v1():
- api_base = os.path.join(api_base, "openai")
- print(api_base)
复制代码 输出的api_base如下:
- https://openaiquanshi.openai.azure.com/openai/deployments/meeting-embedding
复制代码 错误分析2
api_base已经精确,但运行项目照旧报404, 同时弹出了如下警告:
- =============================== warnings summary ===============================
- /Users/a200007/work/ucgit/ucserver/summaryserver/venv/lib/python3.10/site-packages/langchain/embeddings/openai.py:319: UserWarning: If you have openai>=1.0.0 installed and are using Azure, please use the `AzureOpenAIEmbeddings` class.
- warnings.warn(
复制代码 按照上面提示,对于azure,当openai库大于1.0.0时,我们必要使用AzureOpenAIEmbeddings代替OpenAIEmbeddings
- from langchain.embeddings.azure_openai import AzureOpenAIEmbeddings
- api_base = os.environ["OPENAI_API_BASE"]
- if is_openai_v1():
- api_base = os.path.join(api_base, "openai")
- embedding_function = AzureOpenAIEmbeddings(
- deployment=embedding_deployment,
- chunk_size=embedding_max_inputs,
- openai_api_base = api_base
复制代码 使用此embedding_function做测试:
- tensor = embedding.embed_query("今天你去哪儿了?")
- print(tensor)
- > [0.0018476681179545632, -0.003048808135045326, 0.013323151742329006, -0.012344790841118551, -0.027643358824239652, 0.015491746640257776, -0.02547476299498829, -0.0032466613330973887, -0.03310223727411042, -0.017236592553203055, 0.012407106567011756, -0.005380982628351025, 0.00047866445067163386, ……(1535)]
复制代码 错误分析3
继续运行,又报了404,这次是一个新的位置:
前面是embeddings的错误,这次是langchain中chat_models的错误,料想应该都是URL兼容性的问题,于是在构造llm实例时,也加了openai版本的判断和url的处置惩罚:
- api_base = os.environ["OPENAI_API_BASE"]
- if is_openai_v1():
- api_base = os.path.join(api_base, "openai")
- llm = AzureChatOpenAI(
- temperature=0,
- max_tokens=4096,
- ……
- openai_api_base=api_base
- )
复制代码 这样修改后终于运行正常。
参考资料
- 怎样迁徙OpenAI到v1: https://learn.microsoft.com/zh-cn/azure/ai-services/openai/how-to/migration?tabs=python-new%2Cdalle-fix
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