{"id":1402,"date":"2024-05-09T13:33:17","date_gmt":"2024-05-09T13:33:17","guid":{"rendered":"https:\/\/www.nicekj.com\/?p=1402"},"modified":"2024-05-09T13:33:17","modified_gmt":"2024-05-09T13:33:17","slug":"yiwengaodong-langchain-models-san","status":"publish","type":"post","link":"https:\/\/www.nicekj.com\/yiwengaodong-langchain-models-san.html","title":{"rendered":"\ud83d\udd25\ud83d\udd25\ud83d\udd25\u4e00\u6587\u641e\u61c2 Langchain Models \uff08\u4e09\uff09"},"content":{"rendered":"
\n

\u63a5\u4e0a\u6587\u300a\ud83d\udd25\ud83d\udd25\ud83d\udd25\u4e00\u6587\u641e\u61c2 Langchain Models \uff08\u4e8c\uff09\u300b<\/a>\u3002<\/p>\n<\/blockquote>\n

Chat Models<\/h2>\n

\u804a\u5929\u6a21\u578b\u4f7f\u7528LLM\uff08\u5927\u578b\u8bed\u8a00\u6a21\u578b\uff09\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f46\u5177\u6709\u4e0d\u540c\u7684\u63a5\u53e3\uff0c\u4f7f\u7528\u201c\u6d88\u606f\u201d\u800c\u4e0d\u662f\u539f\u59cb\u6587\u672c\u8f93\u5165\/\u8f93\u51fa\u3002LangChain \u63d0\u4f9b\u4e86\u4e0e\u8fd9\u4e9b\u6a21\u578b\u8f7b\u677e\u4ea4\u4e92\u7684\u529f\u80fd\u3002<\/p>\n

\u5728\u804a\u5929\u6a21\u578b\u4e2d\uff0c\u652f\u6301\u4e09\u79cd\u7c7b\u578b\u7684\u6d88\u606f\uff1a<\/p>\n

    \n
  • SystemMessage\uff08\u7cfb\u7edf\u6d88\u606f\uff09 – \u8fd9\u8bbe\u7f6e\u4e86LLM\u7684\u884c\u4e3a\u548c\u76ee\u6807\u3002\u60a8\u53ef\u4ee5\u5728\u8fd9\u91cc\u7ed9\u51fa\u5177\u4f53\u7684\u6307\u793a\uff0c\u5982\uff1a\u201c\u626e\u6f14\u5e02\u573a\u7ecf\u7406\u3002\u201d \u6216 \u201c\u53ea\u8fd4\u56deJSON\u54cd\u5e94\uff0c\u4e0d\u8fd4\u56de\u8bf4\u660e\u6587\u672c\u201d<\/li>\n
  • HumanMessage\uff08\u4eba\u7c7b\u6d88\u606f\uff09 – \u8fd9\u662f\u60a8\u5c06\u7528\u6237\u63d0\u793a\u8f93\u5165\u5e76\u53d1\u9001\u7ed9LLM\u7684\u5730\u65b9<\/li>\n
  • AIMessage\uff08AI\u6d88\u606f\uff09 – \u5f53\u5c06\u804a\u5929\u8bb0\u5f55\u4f20\u56deLLM\u4ee5\u4f9b\u5c06\u6765\u8bf7\u6c42\u65f6\uff0c\u60a8\u53ef\u4ee5\u5728\u8fd9\u91cc\u5b58\u50a8\u6765\u81eaLLM\u7684\u54cd\u5e94\u3002<\/li>\n<\/ul>\n

    \u8fd8\u6709\u4e00\u4e2a\u901a\u7528\u7684 ChatMessage\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u4efb\u610f\u7684\u201c\u89d2\u8272\u201d\u8f93\u5165\uff0c\u53ef\u4ee5\u5728\u9700\u8981\u9664\u7cfb\u7edf\/\u4eba\u7c7b\/AI\u4e4b\u5916\u7684\u5176\u4ed6\u5185\u5bb9\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002\u4f46\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u60a8\u4f1a\u4f7f\u7528\u4e0a\u9762\u63d0\u5230\u7684\u4e09\u79cd\u7c7b\u578b\u3002<\/p>\n

    \u8981\u4f7f\u7528\u5b83\uff0c\u60a8\u9700\u8981\u5bfc\u5165\u6240\u4f7f\u7528\u96c6\u6210\u7684\u804a\u5929\u6a21\u578b\u3002<\/p>\n

    <\/div>
    python<\/span>
    \u590d\u5236\u4ee3\u7801<\/div><\/div><\/div>from<\/span> langchain.chat_models import<\/span> ChatOpenAI<\/span>\nfrom<\/span> langchain.schema import<\/span> (<\/span>\n    AIMessage,<\/span>\n    HumanMessage,<\/span>\n    SystemMessage<\/span>\n)<\/span>\n<\/code><\/pre>\n
    \u7136\u540e\uff0c\u60a8\u9700\u8981\u521d\u59cb\u5316\u804a\u5929\u4ee3\u7406\u3002\u8fd9\u4e2a\u793a\u4f8b\u4f7f\u7528\u4e86 OpenAI \u7684\u804a\u5929\u6a21\u578b\u3002<\/p>\n
    <\/div>
    python<\/span>
    \u590d\u5236\u4ee3\u7801<\/div><\/div><\/div>chat = ChatOpenAI(temperature=0<\/span>)<\/span>\n<\/code><\/pre>\n
    \u4e0eLLM\u6a21\u578b\u4e00\u6837\uff0c\u8fd9\u4e5f\u6709\u591a\u4e2a\u53ef\u4ee5\u8c03\u6574\u7684\u8bbe\u7f6e\uff0c\u4f8b\u5982\uff1a<\/p>\n
      \n
    • model<\/code>\uff08\u6a21\u578b\uff09 – \u9ed8\u8ba4\u4e3a \u201cgpt-3.5-turbo\u201d<\/li>\n
    • temperature<\/code>\uff08\u6e29\u5ea6\uff09 – \u53c2\u89c1\u4e0a\u9762\u7684\u89e3\u91ca<\/li>\n
    • max_tokens<\/code>\uff08\u6700\u5927\u4ee4\u724c\u6570\uff09 – \u8bbe\u7f6eLLM\u5728\u54cd\u5e94\u4e2d\u751f\u6210\u7684\u4ee4\u724c\u6570\u91cf\u7684\u9650\u5236
      \n\u7136\u540e\uff0c\u60a8\u9700\u8981\u5c06\u4e00\u7cfb\u5217\u6d88\u606f\u4f20\u9012\u7ed9\u804a\u5929\u4ee3\u7406\u4ee5\u751f\u6210\u54cd\u5e94\u3002\u5728\u5173\u4e8eLangChain\u7684\u201cMemory\u201d\uff08\u8bb0\u5fc6\uff09\u7684\u672a\u6765\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u7528\u4e8e\u5b58\u50a8\u548c\u5e94\u7528\u804a\u5929\u8bb0\u5f55\u7684ChatMessageHistory\u7c7b\uff0c\u5b83\u53ef\u4ee5\u4f7f\u4ee3\u7406\u8bb0\u4f4f\u804a\u5929\u7684\u4e0a\u4e0b\u6587\u5e76\u5728\u672a\u6765\u7684\u54cd\u5e94\u4e2d\u4f7f\u7528\u5b83\uff0c\u4ece\u800c\u4ea7\u751f\u201c\u5bf9\u8bdd\u201d\u7684\u597d\u5904\u3002<\/li>\n<\/ul>\n
      <\/div>
      python<\/span>
      \u590d\u5236\u4ee3\u7801<\/div><\/div><\/div>messages = [<\/span>\n\tSystemMessage(content=\"Return only a JSON object as a response with no explanation text\"<\/span>),<\/span>\n\tHumanMessage(content=\"Generate a JSON response object containing a brief description and release year for the movie 'Inception'\"<\/span>)<\/span>\n]<\/span>\n<\/span>\nchat(messages)<\/span>\n<\/span>\n# AIMessage(content='{\\\\n  \"title\": \"Inception\",\\\\n  \"description\": \"A skilled thief is given a final chance at redemption which involves executing his toughest job yet: Inception. The idea of planting an idea into someone\\\\'s mind is deemed impossible by most, but Cobb and his team of specialists must accomplish this task to save their lives.\",\\\\n  \"release_year\": 2010\\\\n}', additional_kwargs={})<\/span><\/span>\n<\/span>\n<\/code><\/pre>\n
      \u804a\u5929\u6a21\u578b\uff08Chat Model\uff09\u548cLLM\u6a21\u578b\u4e00\u6837\uff0c\u4e5f\u6709\u4e00\u4e2a\u751f\u6210\u51fd\u6570\uff0c\u60a8\u53ef\u4ee5\u5728\u5176\u4e2d\u4f20\u5165\u591a\u4e2a\u6d88\u606f\u96c6\u5408\u3002\u4e0e\u524d\u8ff0\u7c7b\u4f3c\uff0c\u5b83\u8fd8\u5305\u62ec\u6709\u7528\u7684\u4fe1\u606f\uff0c\u5982\u4ee4\u724c\u4f7f\u7528\u60c5\u51b5\u3002<\/p>\n
      <\/div>
      python<\/span>
      \u590d\u5236\u4ee3\u7801<\/div><\/div><\/div><\/span>\nbatch_messages = [<\/span>\n    [<\/span>\n        SystemMessage(content=\"Return only a JSON object as a response with no explanation text\"<\/span>),<\/span>\n        HumanMessage(content=\"Generate a JSON response object containing a brief description and release year for the movie 'Inception'\"<\/span>)<\/span>\n    ],<\/span>\n    [<\/span>\n        SystemMessage(content=\"Return only a JSON object as a response with no explanation text\"<\/span>),<\/span>\n        HumanMessage(content=\"Generate a JSON response object containing a brief description and release year for the movie 'Avatar'\"<\/span>)<\/span>\n    ]<\/span>\n]<\/span>\nresult = chat.generate(batch_messages)<\/span>\n<\/span>\nprint<\/span>(result.generations[1<\/span>])<\/span>\n# ChatGeneration(text='{\\\\n  \"title\": \"Avatar\",\\\\n  \"description\": \"A paraplegic marine dispatched to the moon Pandora on a unique mission becomes torn between following his orders and protecting the world he feels is his home.\",\\\\n  \"release_year\": 2009\\\\n}', generation_info=None, message=AIMessage(content='{\\\\n  \"title\": \"Avatar\",\\\\n  \"description\": \"A paraplegic marine dispatched to the moon Pandora on a unique mission becomes torn between following his orders and protecting the world he feels is his home.\",\\\\n  \"release_year\": 2009\\\\n}', additional_kwargs={}))<\/span><\/span>\n<\/span>\nprint<\/span>(result.llm_outout)<\/span>\n# {'token_usage': {'prompt_tokens': 91, 'completion_tokens': 151, 'total_tokens': 242}, 'model_name': 'gpt-3.5-turbo'}<\/span><\/span>\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
      \u804a\u5929\u6a21\u578b\u4f7f\u7528LLM\uff08\u5927\u578b\u8bed\u8a00\u6a21\u578b\uff09\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f46\u5177\u6709\u4e0d\u540c\u7684\u63a5\u53e3\uff0c\u4f7f\u7528\u201c\u6d88\u606f\u201d\u800c\u4e0d\u662f\u539f\u59cb\u6587\u672c\u8f93\u5165\/\u8f93\u51fa\u3002LangChain \u63d0\u4f9b\u4e86\u4e0e\u8fd9\u4e9b\u6a21\u578b\u8f7b\u677e\u4ea4\u4e92\u7684\u529f\u80fd\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rank_math_title":"","rank_math_description":"","rank_math_focus_keyword":"","views":"4","footnotes":""},"categories":[3],"tags":[126,127,128,129,136],"collection":[],"class_list":["post-1402","post","type-post","status-publish","format-standard","hentry","category-fenlei2","tag-gpt","tag-ai","tag-128","tag-129","tag-136"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/posts\/1402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/comments?post=1402"}],"version-history":[{"count":0,"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/posts\/1402\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/media?parent=1402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/categories?post=1402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/tags?post=1402"},{"taxonomy":"collection","embeddable":true,"href":"https:\/\/www.nicekj.com\/nicekj2024\/wp\/v2\/collection?post=1402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}