{"id":83,"date":"2026-03-07T20:21:52","date_gmt":"2026-03-07T12:21:52","guid":{"rendered":"https:\/\/sunsyblog.cn\/?p=83"},"modified":"2026-03-07T20:35:00","modified_gmt":"2026-03-07T12:35:00","slug":"langchain%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/sunsyblog.cn\/index.php\/2026\/03\/07\/langchain%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0\/","title":{"rendered":"Langchain\u5b66\u4e60\u7b14\u8bb0"},"content":{"rendered":"\n

.env<\/strong><\/h2>\n\n\n\n

\u4e3a\u65b9\u4fbf\u540e\u7eed\u8c03\u7528\u6a21\u578b\uff0c\u5728\u9879\u76ee\u6839\u76ee\u5f55\u4e0b\u521b\u5efa\u201c.env\u201d\u6587\u4ef6\u5e76\u5199\u5165\u5982\u4e0b\u5185\u5bb9\uff0c\u8be5\u6587\u4ef6\u4e2d\u540e\u7eed\u914d\u7f6e\u4e00\u4e9b\u5927\u6a21\u578b\u7684API_KEY\u548cBASE_URL\u3002<\/p>\n\n\n\n

DEEPSEEK_API_KEY=sk-...4\nDEEPSEEK_BASE_URL=https:\/\/api.deepseek.com\n\nOPENAI_API_KEY=sk-...F\nOPENAI_BASE_URL=https:\/\/api.uchat.site\/v1\n\nANTHROPIC_API_KEY=sk-...F\nANTHROPIC_BASE_URL=https:\/\/api.uchat.site\n\nHUNYUAN_APP_ID=1...8\nHUNYUAN_SECRET_ID=A...7\nHUNYUAN_SECRET_KEY=Y0...W\n\nDASHSCOPE_API_KEY=sk-...4\nDASHSCOPE_BASE_URL=https:\/\/dashscope.aliyuncs.com\/compatible-mode\/v1\n\nZHIPUAI_API_KEY=e...k\nZHIPUAI_BASE_URL=https:\/\/open.bigmodel.cn\/api\/paas\/v4<\/code><\/pre>\n\n\n\n
env_util.py<\/strong><\/h2>\n\n\n\n
\u8be5\u6587\u4ef6\u4e2d\u901a\u8fc7dotenv\u52a0\u8f7d\u5e76\u83b7\u53d6.env\u6587\u4ef6\u4e2d\u914d\u7f6e\u7684\u73af\u5883\u53d8\u91cf\uff0c\u540e\u7eed\u65b9\u4fbf\u5728\u9879\u76ee\u4e2d\u4f7f\u7528\u8fd9\u4e9b\u73af\u5883\u53d8\u91cf\u914d\u7f6e\u7684\u503c\u3002<\/p>\n\n\n\n
import os\n\nfrom dotenv import load_dotenv\n\n# override=True \u786e\u4fdd.env\u6587\u4ef6\u4f18\u5148\nload_dotenv(override=True)\n\n# \u4ece\u73af\u5883\u53d8\u91cf\u8bfb\u53d6\u914d\u7f6e\nDEEPSEEK_API_KEY = os.getenv(\"DEEPSEEK_API_KEY\")\nDEEPSEEK_BASE_URL = os.getenv(\"DEEPSEEK_BASE_URL\")\n\nOPENAI_API_KEY = os.getenv(\"OPENAI_API_KEY\")\nOPENAI_BASE_URL = os.getenv(\"OPENAI_BASE_URL\")\n\nANTHROPIC_API_KEY = os.getenv(\"ANTHROPIC_API_KEY\")\nANTHROPIC_BASE_URL = os.getenv(\"ANTHROPIC_BASE_URL\")\n\nHUNYUAN_APP_ID = os.getenv(\"HUNYUAN_APP_ID\")\nHUNYUAN_SECRET_ID = os.getenv(\"HUNYUAN_SECRET_ID\")\nHUNYUAN_SECRET_KEY = os.getenv(\"HUNYUAN_SECRET_KEY\")\n\nDASHSCOPE_API_KEY = os.getenv(\"DASHSCOPE_API_KEY\")\nDASHSCOPE_BASE_URL = os.getenv(\"DASHSCOPE_BASE_URL\")\n\nZHIPUAI_API_KEY = os.getenv(\"ZHIPUAI_API_KEY\")\nZHIPUAI_BASE_URL = os.getenv(\"ZHIPUAI_BASE_URL\")<\/code><\/pre>\n\n\n\n
my_llm.py<\/strong><\/h2>\n\n\n\n
from langchain_anthropic import ChatAnthropic\nfrom langchain_community.chat_models import ChatHunyuan, ChatTongyi, ChatZhipuAI\nfrom langchain_deepseek import ChatDeepSeek\nfrom langchain_ollama import ChatOllama\nfrom langchain_openai import ChatOpenAI\n\nfrom env_utils import DEEPSEEK_API_KEY, DEEPSEEK_BASE_URL, OPENAI_API_KEY, OPENAI_BASE_URL, ANTHROPIC_API_KEY, \\\n    ANTHROPIC_BASE_URL, HUNYUAN_APP_ID, HUNYUAN_SECRET_ID, HUNYUAN_SECRET_KEY, DASHSCOPE_API_KEY, DASHSCOPE_BASE_URL, \\\n    ZHIPUAI_API_KEY, ZHIPUAI_BASE_URL\n\n# \u521b\u5efaDeepSeek LLM\ndeepseek_llm = ChatDeepSeek(\n    api_key=DEEPSEEK_API_KEY,\n    api_base=DEEPSEEK_BASE_URL, # \u6ce8\u610f\uff1a\u8fd9\u91cc\u662fapi_base\uff0c\u4e0d\u662fbase_url\n    model=\"deepseek-chat\",\n)\n\n\nopenai_llm = ChatOpenAI(\n    api_key=OPENAI_API_KEY,\n    base_url=OPENAI_BASE_URL,\n    model=\"gpt-4\",\n)\n\nanthropic_llm = ChatAnthropic(\n    api_key=ANTHROPIC_API_KEY,\n    base_url=ANTHROPIC_BASE_URL,\n    model=\"claude-3-5-haiku-latest\",\n)\n\n\nollama_llm = ChatOllama(\n    base_url=\"http:\/\/192.168.1.106:11434\",\n    model=\"deepseek-r1:1.5b\",\n)\n\nhunyuan_llm = ChatHunyuan(\n    hunyuan_app_id = HUNYUAN_APP_ID,\n    hunyuan_secret_id = HUNYUAN_SECRET_ID,\n    hunyuan_secret_key = HUNYUAN_SECRET_KEY,\n    model=\"hunyuan-lite\",\n)\n\ntongyi_llm = ChatTongyi(\n    api_key=DASHSCOPE_API_KEY,\n    model=\"qwen-plus\",\n)\n\n\nzhipu_llm = ChatZhipuAI(\n    api_key=ZHIPUAI_API_KEY,\n    model=\"glm-4\",\n)<\/code><\/pre>\n\n\n\n
\u5982\u679c\u4e00\u4e9b\u6a21\u578b\u4f9b\u5e94\u5546\u4e5f\u540c\u65f6\u517c\u5bb9OpenAI ,\u90a3\u4e48\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528ChatOpenAI\u65b9\u5f0f\u8fdb\u884c\u8fde\u63a5\uff0c\u8fd9\u6837\u5bf9\u4e8e\u4e00\u4e9b\u76ee\u524dLangChain\u4e0d\u652f\u6301\u7684\u6a21\u578b\u4f9b\u5e94\u5546\uff0c\u4f46\u8fd9\u4e9b\u4f9b\u5e94\u5546\u652f\u6301\u6807\u51c6\u7684OpenAI \u65b9\u5f0f\u8fde\u63a5\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
# \u901a\u8fc7ChatOpenAI \u8fde\u63a5deepseek\u6a21\u578b\ndeepseek_llm2 = ChatOpenAI(\n    api_key=DEEPSEEK_API_KEY,\n    base_url=DEEPSEEK_BASE_URL,\n    model=\"deepseek-chat\",\n)\n\n#\u901a\u8fc7ChatOpenAI \u8fde\u63a5\u901a\u4e49\u5343\u95ee\u6a21\u578b\ntongyi_llm2 = ChatOpenAI(\n    api_key=DASHSCOPE_API_KEY,\n    base_url=DASHSCOPE_BASE_URL,\n    model=\"qwen-plus\",\n)\n\n#\u901a\u8fc7ChatOpenAI \u8fde\u63a5\u667a\u666eAI\u6a21\u578b\nzhipu_llm2 = ChatOpenAI(\n    api_key=ZHIPUAI_API_KEY,\n    base_url=ZHIPUAI_BASE_URL,\n    model=\"glm-4\",\n)<\/code><\/pre>\n\n\n\n