\n| Pydantic<\/td>\n | class Xxx(BaseModel)<\/td>\n | Pydantic \u5bf9\u8c61<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u51fd\u6570\u53c2\u6570：<\/span><\/p>\n\n\u53c2\u6570\u8bf4\u660e<\/tr>\n \n\n| schema<\/td>\n | \u8f93\u51fa\u7ed3\u6784：JSON\u3001TypedDict\u3001Pydantic\u3001OpenAI \u51fd\u6570\/\u5de5\u5177<\/td>\n<\/tr>\n | \n| method<\/td>\n | LLM \u7684\u751f\u6210\u65b9\u6cd5：json_schema（\u9ed8\u8ba4）\u3001function_calling\u3001json_mode<\/td>\n<\/tr>\n | \n| include_raw<\/td>\n | False（\u9ed8\u8ba4）\u4ec5\u8fd4\u56de\u89e3\u6790\u7ed3\u679c，\u51fa\u9519\u629b\u5f02\u5e38；True \u8fd4\u56de\u542b "raw"\/"parsed"\/"parsing_error" \u7684\u5b57\u5178<\/td>\n<\/tr>\n | \n| strict<\/td>\n | True \u4fdd\u8bc1\u8f93\u51fa\u4e0e schema \u5b8c\u5168\u5339\u914d；False \u4e0d\u9a8c\u8bc1；None（\u9ed8\u8ba4）\u4e0d\u4f20\u9012<\/td>\n<\/tr>\n | \n| tools<\/td>\n | \u7ed1\u5b9a\u5230\u6a21\u578b\u7684\u5de5\u5177\u5217\u8868（\u8981\u6c42 method=json_schema\u3001strict=True\u3001include_raw=True）<\/td>\n<\/tr>\n | \n| kwargs(Any)<\/td>\n | \u9644\u52a0\u53c2\u6570，\u76f4\u63a5\u4f20\u9012\u7ed9 bind()<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n method \u4e09\u79cd\u53d6\u503c：<\/span><\/p>\n\nmethod\u8bf4\u660e<\/tr>\n \n\n| json_schema（\u9ed8\u8ba4）<\/td>\n | \u4f7f\u7528 OpenAI \u7684\u7ed3\u6784\u5316\u8f93\u51fa API<\/td>\n<\/tr>\n | \n| function_calling<\/td>\n | \u4f7f\u7528 OpenAI \u7684\u5de5\u5177\u8c03\u7528（DeepSeek \u9700\u6307\u5b9a\u6b64\u65b9\u5f0f）<\/td>\n<\/tr>\n | \n| json_mode<\/td>\n | \u4f7f\u7528 OpenAI \u7684 JSON mode（\u987b\u5728\u63d0\u793a\u4e2d\u8bf4\u660e\u8f93\u51fa\u683c\u5f0f）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u8fd4\u56de\u503c：\u8fd4\u56de\u4e00\u4e2a Runnable \u5b9e\u4f8b\u3002<\/p>\n \n- \n
\u5982\u679c include_raw=False：schema \u662f Pydantic \u7c7b\u5219\u8f93\u51fa Pydantic \u5bf9\u8c61，\u5426\u5219\u8f93\u51fa\u5b57\u5178\u3002<\/p>\n<\/li>\n - \n
\u5982\u679c include_raw=True：\u8f93\u51fa\u542b\u4e09\u4e2a\u952e\u7684\u5b57\u5178\u2014\u2014'raw'（\u539f\u59cb BaseMessage）\u3001'parsed'（\u89e3\u6790\u7ed3\u679c，\u51fa\u9519\u4e3a None）\u3001'parsing_error'（\u89e3\u6790\u5f02\u5e38，\u65e0\u5219 None）\u3002<\/p>\n<\/li>\n<\/ul>\n 2.2 Pydantic \u5bf9\u8c61<\/span><\/h5>\n\u5c06\u6267\u884c Runnable \u540e\u7684\u8f93\u51fa\u7ed3\u679c\u6307\u5b9a\u4e3a Pydantic \u7c7b，\u5c06\u8fd4\u56de\u4e00\u4e2a Pydantic \u5bf9\u8c61\u3002\u5f53\u6536\u5230\u6a21\u578b\u7684\u54cd\u5e94\u540e，LangChain \u4f1a\u63d0\u53d6\u51fa\u4ee3\u8868 Pydantic \u53c2\u6570\u7684 JSON \u5bf9\u8c61，\u5e76\u7528 Pydantic \u6a21\u578b\u5bf9\u5176\u8fdb\u884c\u89e3\u6790\u548c\u9a8c\u8bc1，\u6700\u7ec8\u5c06\u8fd9\u4e2a\u9a8c\u8bc1\u540e\u7684 JSON \u8f6c\u6362\u4e3a\u4e00\u4e2a\u53ef\u7528\u7684 Pydantic \u5bf9\u8c61\u5b9e\u4f8b\u8fd4\u56de\u3002<\/p>\n import os
\nfrom langchain_openai import ChatOpenAI
\nfrom typing import Optional
\nfrom pydantic import BaseModel, Field<\/p>\n # ========== 1. \u521d\u59cb\u5316\u6a21\u578b ==========
\nmodel = ChatOpenAI(
\nmodel="deepseek-chat",
\napi_key=os.getenv("DEEPSEEK_API_KEY"), # Key \u4ece\u73af\u5883\u53d8\u91cf\u8bfb
\nbase_url="https:\/\/api.deepseek.com", # DeepSeek \u63a5\u53e3\u5730\u5740
\ntemperature= 1.5
\n)<\/p>\n # ========== 2. \u5b9a\u4e49\u8f93\u51fa\u7ed3\u6784（Pydantic \u7c7b） ==========
\n# \u544a\u8bc9\u6a21\u578b"\u4f60\u5fc5\u987b\u6309\u8fd9\u4e2a\u7ed3\u6784\u8fd4\u56de"：\u5b57\u6bb5\u3001\u7c7b\u578b\u3001\u63cf\u8ff0
\nclass Joke(BaseModel):
\n"""\u7ed9\u7528\u6237\u8bb2\u4e00\u4e2a\u7b11\u8bdd\u3002"""
\nsetup: str = Field(description="\u8fd9\u4e2a\u7b11\u8bdd\u7684\u5f00\u5934")
\npunchline: str = Field(description="\u8fd9\u4e2a\u7b11\u8bdd\u7684\u5999\u8bed")
\nrating: Optional[int] = Field(default=None, description="\u4ece1\u523010\u5206，\u7ed9\u8fd9\u4e2a\u7b11\u8bdd\u8bc4\u5206")<\/p>\n # ========== 3. \u628a\u6a21\u578b\u5305\u88c5\u6210"\u7ed3\u6784\u5316\u8f93\u51fa"\u6a21\u578b ==========
\n# \u5173\u952e：\u5fc5\u987b\u6307\u5b9a method="function_calling"！
\n# \u9ed8\u8ba4\u7684 json_schema \u65b9\u5f0f DeepSeek \u4e0d\u652f\u6301
\n# function_calling = \u6a21\u578b\u6309"\u5de5\u5177\u8c03\u7528"\u7684\u65b9\u5f0f\u8fd4\u56de JSON，DeepSeek \u652f\u6301
\nstructured_model = model.with_structured_output(Joke, method="function_calling")<\/p>\n # ========== 4. \u8c03\u7528\u5e76\u53d6\u7ed3\u679c ==========
\nresult = structured_model.invoke("\u7ed9\u6211\u8bb2\u4e00\u4e2a\u5173\u4e8e\u5531\u6b4c\u7684\u7b11\u8bdd")
\nprint(result) # \u8fd4\u56de\u7684\u662f Joke \u5bf9\u8c61<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122550-6a9ffecea0867.png\") <\/p>\n
2.3 TypedDict<\/span><\/h5>\n\u5148\u4e86\u89e3\u4e00\u4e0b TypedDict，\u5b83\u7528\u4e8e\u4e3a\u5b57\u5178\u5bf9\u8c61\u63d0\u4f9b\u7cbe\u786e\u7684\u3001\u7ed3\u6784\u5316\u7684\u7c7b\u578b\u63d0\u793a\u3002\u5b83\u5141\u8bb8\u6211\u4eec\u6307\u5b9a\u4e00\u4e2a\u5b57\u5178\u4e2d\u5e94\u8be5\u6709\u54ea\u4e9b\u952e，\u4ee5\u53ca\u6bcf\u4e2a\u952e\u5bf9\u5e94\u7684\u503c\u7684\u7c7b\u578b\u3002\u6700\u6e05\u6670\u3001\u6700\u5e38\u7528\u7684\u5b9a\u4e49\u65b9\u5f0f，\u5c31\u662f\u7c7b\u4f3c\u4e8e\u5b9a\u4e49\u4e00\u4e2a\u7c7b（Python 3.8+）：<\/p>\n from typing import TypedDict
\n\u200b
\nclass User(TypedDict):
\n \u00a0 \u00a0name: str
\n \u00a0 \u00a0age: int
\n \u00a0 \u00a0email: str
\n \u00a0 \u00a0is_active: bool = True \u00a0# \u9ed8\u8ba4\u503c <\/p>\n \u8fd9\u6709\u4ec0\u4e48\u2f64\u5462？\u5bf9\u4e8e\u5b83\u2fae\u5e38\u91cd\u8981\u7684\u2f00\u4e2a\u80fd\u2f12\u5c31\u662f\u6355\u6349\u952e\u540d\u62fc\u5199\u9519\u8bef\u4e0e\u7c7b\u578b\u9519\u8bef\u3002<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122550-6a9ffeceafcfa.png\") \u200b<\/p>\n
\u540c\u6837，\u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u6267\u884c Runnable \u540e\u7684\u8f93\u51fa\u7ed3\u679c\u6307\u5b9a\u4e3a TypedDict \u7c7b，\u8fd9\u5c06\u8fd4\u56de\u4e00\u4e2a\u5b57\u5178，\u4e14\u8f93\u51fa\u540e，\u4f1a\u6839\u636e TypedDict \u7684\u5b9a\u4e49\u8fdb\u884c\u9a8c\u8bc1：<\/p>\n import os
\nfrom langchain_openai import ChatOpenAI
\nfrom typing import Optional
\nfrom typing_extensions import Annotated, TypedDict<\/p>\n # ========== 1. \u521d\u59cb\u5316\u6a21\u578b ==========
\nmodel = ChatOpenAI(
\nmodel="deepseek-chat",
\napi_key=os.getenv("DEEPSEEK_API_KEY"), # Key \u4ece\u73af\u5883\u53d8\u91cf\u8bfb
\nbase_url="https:\/\/api.deepseek.com", # DeepSeek \u63a5\u53e3\u5730\u5740
\ntemperature=1.5, # \u6e29\u5ea6\u9ad8\u4e00\u70b9，\u8bb2\u7b11\u8bdd\u66f4\u6709\u521b\u610f（\u8303\u56f4 0~2）
\n)<\/p>\n # ========== 2. \u5b9a\u4e49\u8f93\u51fa\u7ed3\u6784（TypedDict） ==========
\n# TypedDict = \u53ea\u63cf\u8ff0"\u7ed3\u6784\u957f\u4ec0\u4e48\u6837"\u7684\u5b57\u5178\u7c7b\u578b，\u6bd4 Pydantic \u66f4\u8f7b\u91cf
\nclass Joke(TypedDict):
\n"""\u7ed9\u7528\u6237\u8bb2\u4e00\u4e2a\u7b11\u8bdd\u3002"""
\nsetup: Annotated[str, …, "\u8fd9\u4e2a\u7b11\u8bdd\u7684\u5f00\u5934"]
\npunchline: Annotated[str, …, "\u8fd9\u4e2a\u7b11\u8bdd\u7684\u5999\u8bed"]
\nrating: Annotated[Optional[int], None, "\u4ece1\u523010\u5206，\u7ed9\u8fd9\u4e2a\u7b11\u8bdd\u8bc4\u5206"] <\/p>\n # ========== 3. \u628a\u6a21\u578b\u5305\u88c5\u6210"\u7ed3\u6784\u5316\u8f93\u51fa"\u6a21\u578b ==========
\n# \u5173\u952e：\u5fc5\u987b\u6307\u5b9a method="function_calling"！
\n# \u9ed8\u8ba4\u7684 json_schema \u65b9\u5f0f DeepSeek \u4e0d\u652f\u6301（400 \u62a5\u9519）
\nstructured_model = model.with_structured_output(Joke, method="function_calling")<\/p>\n # ========== 4. \u8c03\u7528\u5e76\u53d6\u7ed3\u679c ==========
\nresult = structured_model.invoke("\u7ed9\u6211\u8bb2\u4e00\u4e2a\u5173\u4e8e\u8df3\u821e\u7684\u7b11\u8bdd")
\nprint(result) # \u8fd4\u56de\u7684\u662f\u3010\u5b57\u5178\u3011dict（\u4e0d\u662f\u5bf9\u8c61！）
\nprint("\u5f00\u5934:", result["setup"]) # \u5b57\u5178\u7528 [\u952e\u540d] \u53d6\u503c（\u6ce8\u610f！\u4e0d\u662f .\u5b57\u6bb5\u540d） <\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecf103c6.png\") <\/p>\n
\u8ba9\u6211\u4eec\u52a0\u5165 include_raw=True，\u518d\u6765\u770b\u770b\u6548\u679c：<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecf209f4.png\") \u200b <\/p>\n
\u53ef\u4ee5\u770b\u5230：raw \u662f\u6a21\u578b\u539f\u59cb\u54cd\u5e94（\u542b tool_calls），parsed \u662f\u89e3\u6790\u540e\u7684\u5b57\u5178，parsing_error \u65e0\u9519\u8bef\u65f6\u4e3a None\u3002<\/p>\n 2.4 \u8fd4\u56de JSON<\/span><\/h5>\n\u8fd8\u53ef\u4ee5\u8ba9\u804a\u5929\u6a21\u578b\u76f4\u63a5\u8fd4\u56de JSON，\u53ea\u4e0d\u8fc7\u4e3a\u4e86\u58f0\u660e JSON，\u6211\u4eec\u9700\u8981\u5b9a\u4e49 JSON Schema：<\/p>\n import os
\nfrom langchain_openai import ChatOpenAI<\/p>\n # ========== 1. \u521d\u59cb\u5316\u6a21\u578b ==========
\nmodel = ChatOpenAI(
\nmodel="deepseek-chat",
\napi_key=os.getenv("DEEPSEEK_API_KEY"), # Key \u4ece\u73af\u5883\u53d8\u91cf\u8bfb
\nbase_url="https:\/\/api.deepseek.com", # DeepSeek \u63a5\u53e3\u5730\u5740
\ntemperature=1.5, # \u6e29\u5ea6\u9ad8\u4e00\u70b9，\u8bb2\u7b11\u8bdd\u66f4\u6709\u521b\u610f（\u8303\u56f4 0~2）
\n)<\/p>\n # ========== 2. \u5b9a\u4e49\u8f93\u51fa\u7ed3\u6784（JSON Schema \u5b57\u5178） ==========
\n# \u8fd9\u662f\u7ed3\u6784\u5316\u8f93\u51fa\u7684\u7b2c\u4e09\u79cd\u5199\u6cd5：\u76f4\u63a5\u7528 JSON Schema \u63cf\u8ff0\u7ed3\u6784
\n# \u7ed3\u6784\u8bf4\u660e：
\n# title = \u7ed3\u6784\u540d\u5b57
\n# description = \u6574\u4f53\u63cf\u8ff0（\u6a21\u578b\u53c2\u8003）
\n# type = \u9876\u5c42\u662f\u5bf9\u8c61 object
\n# properties = \u5b57\u6bb5\u5217\u8868：\u6bcf\u4e2a\u5b57\u6bb5\u5199 \u7c7b\u578b + \u63cf\u8ff0
\n# required = \u5fc5\u586b\u5b57\u6bb5\u6e05\u5355（\u6ca1\u5217\u8fdb\u53bb\u7684\u5c31\u662f\u53ef\u9009\u7684）
\njson_schema = {
\n"title": "joke",
\n"description": "\u7ed9\u7528\u6237\u8bb2\u4e00\u4e2a\u7b11\u8bdd\u3002",
\n"type": "object",
\n"properties": {
\n "setup": {
\n "type": "string",
\n "description": "\u8fd9\u4e2a\u7b11\u8bdd\u7684\u5f00\u5934",
\n },
\n "punchline": {
\n "type": "string",
\n "description": "\u8fd9\u4e2a\u7b11\u8bdd\u7684\u5999\u8bed",
\n },
\n "rating": {
\n "type": "integer",
\n "description": "\u4ece1\u523010\u5206，\u7ed9\u8fd9\u4e2a\u7b11\u8bdd\u8bc4\u5206",
\n "default": None, # \u53ef\u9009\u5b57\u6bb5（\u4e0d\u5728 required \u91cc）
\n },
\n},
\n"required": ["setup", "punchline"], # \u53ea\u6709 setup \u548c punchline \u662f\u5fc5\u586b
\n}<\/p>\n # ========== 3. \u5305\u88c5\u6210\u7ed3\u6784\u5316\u8f93\u51fa ==========
\n# \u5173\u952e：\u5fc5\u987b\u6307\u5b9a method="function_calling"！
\n# \u9ed8\u8ba4\u7684 json_schema \u65b9\u5f0f DeepSeek \u4e0d\u652f\u6301（400 \u62a5\u9519）
\nstructured_model = model.with_structured_output(json_schema, method="function_calling")<\/p>\n # ========== 4. \u8c03\u7528\u5e76\u53d6\u7ed3\u679c ==========
\nresult = structured_model.invoke("\u7ed9\u6211\u8bb2\u4e00\u4e2a\u5173\u4e8e\u5531\u6b4c\u7684\u7b11\u8bdd")
\nprint(result) # \u8fd4\u56de\u5b57\u5178：{'setup': …, 'punchline': …, 'rating': …}<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecf5325d.png\") <\/p>\n
2.5 \u4f7f\u7528\u573a\u666f：\u4fe1\u606f\u63d0\u53d6\u5668<\/span><\/h5>\n import os
\nfrom langchain_openai import ChatOpenAI
\nfrom typing import Optional
\nfrom pydantic import BaseModel, Field
\nfrom langchain_core.messages import HumanMessage, SystemMessage<\/p>\n # ========== 1. \u521d\u59cb\u5316\u6a21\u578b）==========
\nmodel = ChatOpenAI(
\nmodel="deepseek-chat",
\napi_key=os.getenv("DEEPSEEK_API_KEY"),
\nbase_url="https:\/\/api.deepseek.com",
\n)<\/p>\n # ========== 2. \u5b9a\u4e49\u8f93\u51fa\u7ed3\u6784（Pydantic \u7c7b） ==========
\n# \u4fe1\u606f\u63d0\u53d6\u573a\u666f\u7684\u5173\u952e\u6280\u5de7：
\n# 1. \u6bcf\u4e2a\u5b57\u6bb5\u90fd\u7528 Optional \u2014\u2014 LLM \u4e0d\u77e5\u9053\u7b54\u6848\u65f6\u8fd4\u56de None（\u4e0d\u786c\u7f16）
\n# 2. \u6bcf\u4e2a\u5b57\u6bb5\u90fd\u6709 description \u2014\u2014 LLM \u6839\u636e\u63cf\u8ff0\u53bb\u6587\u672c\u91cc\u627e\u4fe1\u606f
\nclass Person(BaseModel):
\n"""\u4e00\u4e2a\u4eba\u7684\u4fe1\u606f\u3002"""
\nname: Optional[str] = Field(default=None, description="\u8fd9\u4e2a\u4eba\u7684\u540d\u5b57")
\nhair_color: Optional[str] = Field(default=None, description="\u5982\u679c\u77e5\u9053\u8fd9\u4e2a\u4eba\u5934\u53d1\u7684\u989c\u8272")
\nskin_color: Optional[str] = Field(default=None, description="\u5982\u679c\u77e5\u9053\u8fd9\u4e2a\u4eba\u7684\u80a4\u8272")
\nheight_in_meters: Optional[float] = Field(default=None, description="\u4ee5\u7c73\u4e3a\u5355\u4f4d\u7684\u9ad8\u5ea6")<\/p>\n # ========== 3. \u5305\u88c5\u6210\u7ed3\u6784\u5316\u8f93\u51fa ==========
\n# \u5173\u952e：\u5fc5\u987b\u6307\u5b9a method="function_calling"！\u9ed8\u8ba4\u65b9\u5f0f DeepSeek \u4e0d\u652f\u6301（400）
\nstructured_model = model.with_structured_output(schema=Person, method="function_calling")<\/p>\n # ========== 4. \u51c6\u5907\u6d88\u606f：SystemMessage \u6559\u89c4\u5219 + HumanMessage \u7ed9\u539f\u6587 ==========
\nmessages = [
\nSystemMessage(content="\u4f60\u662f\u4e00\u4e2a\u63d0\u53d6\u4fe1\u606f\u7684\u4e13\u5bb6，\u53ea\u4ece\u6587\u672c\u4e2d\u63d0\u53d6\u76f8\u5173\u4fe1\u606f\u3002"
\n "\u5982\u679c\u60a8\u4e0d\u77e5\u9053\u8981\u63d0\u53d6\u7684\u5c5e\u6027\u7684\u503c，\u5c5e\u6027\u503c\u8fd4\u56denull"),
\nHumanMessage(content="\u53f2\u5bc6\u65af\u8eab\u9ad86\u82f1\u5c3a，\u91d1\u53d1\u3002"),
\n]<\/p>\n # ========== 5. \u8c03\u7528\u5e76\u53d6\u7ed3\u679c ==========
\nresult = structured_model.invoke(messages)
\nprint(result) # Person \u5bf9\u8c61：name='\u53f2\u5bc6\u65af' hair_color='\u91d1\u53d1' skin_color=None …
\nprint("\u540d\u5b57:", result.name) # \u5bf9\u8c61\u7528 .\u5b57\u6bb5\u540d \u53d6\u503c
\nprint("\u8eab\u9ad8(\u7c73):", result.height_in_meters)<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecf62ad4.png\") <\/p>\n
\n\u4e09\u3001\u804a\u5929\u6a21\u578b：\u6d41\u5f0f\u4f20\u8f93<\/h3>\n\u6d41\u5f0f\u5904\u7406\u5bf9\u4e8e\u57fa\u4e8e LLM \u7684\u5e94\u7528\u7a0b\u5e8f\u80fd\u591f\u54cd\u5e94\u6700\u7ec8\u7528\u6237\u81f3\u5173\u91cd\u8981\u3002\u5b83\u901a\u8fc7\u9010\u6b65\u663e\u793a\u8f93\u51fa，\u5373\u4f7f\u5728\u5b8c\u6574\u7684\u54cd\u5e94\u51c6\u5907\u5c31\u7eea\u4e4b\u524d，\u6d41\u5f0f\u4f20\u8f93\u4e5f\u80fd\u663e\u8457\u6539\u5584\u7528\u6237\u4f53\u9a8c\u3002\u6211\u4eec\u4e4b\u524d\u76f4\u63a5\u4f7f\u7528 invoke \u7684\u8c03\u7528\u65b9\u5f0f\u5c5e\u4e8e\u975e\u6d41\u5f0f\u4f20\u8f93，\u73b0\u8c61\u662f\u804a\u5929\u6a21\u578b\u76f4\u63a5\u8fd4\u56de\u5168\u91cf\u5185\u5bb9\u3002\u82e5\u6a21\u578b\u601d\u8003\u65f6\u95f4\u8f83\u957f，\u5219\u6211\u4eec\u7b49\u5f85\u7684\u65f6\u95f4\u5c31\u8d8a\u957f\u3002<\/p>\n \n\u65b9\u5f0f\u73b0\u8c61\u6bd4\u55bb<\/tr>\n \n\n| invoke<\/td>\n | \u7b49\u6a21\u578b\u5168\u90e8\u751f\u6210\u5b8c，\u4e00\u6b21\u6027\u8fd4\u56de\u5168\u91cf\u5185\u5bb9<\/td>\n | \u50cf\u6536\u5feb\u9012，\u7b49\u534a\u5929\u4e00\u6b21\u62ff\u5230<\/td>\n<\/tr>\n | \n| stream<\/td>\n | \u6a21\u578b\u751f\u6210\u4e00\u4e2a\u5b57\u5c31\u7ed9\u4e00\u4e2a\u5b57<\/td>\n | \u50cf\u770b\u76f4\u64ad，\u9010\u5b57\u51fa\u73b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n3.1 stream() \u540c\u6b65\u6d41\u5f0f\u4f20\u8f93<\/span><\/h5>\n\u5728 LangChain \u804a\u5929\u6a21\u578b\u4e2d，\u53ef\u4ee5\u4f7f\u7528\u5176 .stream() \u65b9\u6cd5，\u6765\u540c\u6b65\u751f\u6210\u6d41\u5f0f\u54cd\u5e94\u7684\u6548\u679c\u3002\u804a\u5929\u6a21\u578b\u7684 .stream() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668，\u8be5\u8fed\u4ee3\u5668\u5728\u751f\u6210\u8f93\u51fa\u65f6\u540c\u6b65\u4ea7\u751f\u8f93\u51fa\u6d88\u606f\u5757\u3002\u53ef\u4ee5\u4f7f\u7528 for \u5faa\u73af\u5b9e\u65f6\u5904\u7406\u6bcf\u4e2a\u5757\u3002<\/p>\n import os
\nfrom langchain_openai import ChatOpenAI<\/p>\n # ========== 1. \u521d\u59cb\u5316\u6a21\u578b ==========
\nmodel = ChatOpenAI(
\nmodel="deepseek-chat",
\napi_key=os.getenv("DEEPSEEK_API_KEY"), # Key \u4ece\u73af\u5883\u53d8\u91cf\u8bfb
\nbase_url="https:\/\/api.deepseek.com", # DeepSeek \u63a5\u53e3\u5730\u5740
\n)<\/p>\n # ========== 2. \u6d41\u5f0f\u8f93\u51fa ==========
\n# \u548c invoke \u7684\u533a\u522b：
\n# invoke = \u7b49\u6a21\u578b\u5168\u90e8\u751f\u6210\u5b8c，\u4e00\u6b21\u6027\u8fd4\u56de（\u50cf\u6536\u5feb\u9012，\u7b49\u534a\u5929\u4e00\u6b21\u62ff\u5230）
\n# stream = \u6a21\u578b\u751f\u6210\u4e00\u4e2a\u5b57\u5c31\u7ed9\u4f60\u4e00\u4e2a\u5b57（\u50cf\u770b\u76f4\u64ad，\u9010\u5b57\u51fa\u73b0）
\nchunks = []
\nfor chunk in model.stream("\u8bb2\u4e00\u4e2a\u7b11\u8bdd"):
\nchunks.append(chunk) # \u2460 \u6536\u96c6\u6bcf\u4e00\u5757（\u540e\u9762\u53ef\u4ee5\u62fc\u6210\u5b8c\u6574\u6587\u672c）
\nprint(chunk.content, end="|", flush=True) # \u2461 \u5b9e\u65f6\u6253\u5370：end="|" \u4e0d\u6362\u884c，flush=True \u5f3a\u5236\u7acb\u5373\u663e\u793a<\/p>\n print() # \u5faa\u73af\u7ed3\u675f\u540e\u6362\u884c
\nprint("\u5206\u5757\u6570\u91cf:", len(chunks)) # \u770b\u770b\u4e00\u6bb5\u8bdd\u88ab\u5207\u6210\u4e86\u51e0\u5757
\nprint("\u5b8c\u6574\u5185\u5bb9:", "".join(c.content for c in chunks)) # \u628a\u5757\u62fc\u56de\u5b8c\u6574\u6587\u672c<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecf7549e.png\") \u200b<\/p>\n
\u6211\u4eec\u5f97\u5230\u4e86\u4e00\u4e2a\u53eb\u505a AIMessageChunk \u7684\u4e1c\u897f，\u5b83\u4ee3\u8868 AIMessage \u7684\u4e00\u90e8\u5206，\u4e5f\u5c31\u662f\u6d88\u606f\u5757：<\/p>\n print(chunks[0] + chunks[1] + chunks[2] + chunks[3] + chunks[4])<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecf92a4d.png\") <\/p>\n
3.2 \u5f02\u6b65\u76f8\u5173\u6982\u5ff5<\/span><\/h5>\n\u5bf9\u4e8e\u6d41\u5f0f\u4f20\u8f93，\u901a\u5e38\u6211\u4eec\u53ef\u4ee5\u9009\u62e9\u5f02\u6b65\u8c03\u7528\u3002 \u5148\u6765\u4e86\u89e3\u4e0b\u5f02\u6b65\u76f8\u5173\u77e5\u8bc6\u3002<\/p>\n \u60f3\u8c61\u4e00\u4e2a\u573a\u666f：\u4f60\u9700\u8981\u716e\u4e00\u58f6\u6c34，\u540c\u65f6\u8fd8\u8981\u7ed9\u670b\u53cb\u53d1\u4e00\u6761\u77ed\u4fe1\u3002\u6211\u4eec\u5206\u522b\u7528\u540c\u6b65（\u4f20\u7edf） \u548c\u5f02\u6b65\u4e24\u79cd\u65b9\u5f0f\u6765\u5b8c\u6210，\u4ee5\u6b64\u5bf9\u6bd4\u5e76\u5f15\u5165\u534f\u7a0b\u548c\u4e8b\u4ef6\u5faa\u73af\u7684\u6982\u5ff5\u3002<\/p>\n \u540c\u6b65（\u963b\u585e）\u65b9\u5f0f：\u8fd9\u5c31\u50cf\u662f\u4e00\u4e2a"\u6b7b\u5fc3\u773c"\u7684\u4eba，\u505a\u4e8b\u5fc5\u987b\u4e00\u4ef6\u4e00\u4ef6\u6765\u2014\u2014\u5148\u82b1 5 \u79d2\u716e\u6c34（\u671f\u95f4\u4ec0\u4e48\u4e5f\u4e0d\u80fd\u505a），\u6c34\u5f00\u540e\u518d\u82b1 2 \u79d2\u53d1\u77ed\u4fe1，\u603b\u8017\u65f6 7 \u79d2\u3002<\/p>\n import time<\/p>\n def boil_water():
\n print("\u5f00\u59cb\u716e\u6c34…")
\n time.sleep(5) # \u6a21\u62df\u963b\u585e\u7b49\u5f855\u79d2
\n print("\u6c34\u5f00\u4e86！")<\/p>\n def send_message():
\n print("\u5f00\u59cb\u53d1\u77ed\u4fe1…")
\n time.sleep(2) # \u6a21\u62df\u963b\u585e\u7b49\u5f852\u79d2
\n print("\u77ed\u4fe1\u53d1\u9001\u6210\u529f！")<\/p>\n def main():
\n boil_water() # \u5148\u82b15\u79d2\u716e\u6c34，\u671f\u95f4\u4ec0\u4e48\u4e5f\u4e0d\u80fd\u505a
\n send_message() # \u6c34\u5f00\u540e\u518d\u82b12\u79d2\u53d1\u77ed\u4fe1<\/p>\n main() <\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecfa06d5.png\") <\/p>\n
\u5f02\u6b65\u65b9\u5f0f：\u6211\u4eec\u8bf7\u51fa asyncio\u3001\u534f\u7a0b\u548c\u4e8b\u4ef6\u5faa\u73af\u3002<\/p>\n \u5148\u770b\u4e09\u79cd\u5e76\u53d1\u6a21\u578b\u7684\u533a\u522b：<\/span><\/p>\n\n\u6a21\u578b\u539f\u7406\u7279\u70b9<\/tr>\n \n\n| \u591a\u8fdb\u7a0b<\/td>\n | \u5229\u7528\u591a\u6838 CPU \u540c\u65f6\u6267\u884c\u591a\u4e2a\u4efb\u52a1<\/td>\n | \u5404\u81ea\u72ec\u7acb\u5185\u5b58，\u8fdb\u7a0b\u95f4\u901a\u4fe1\u9ebb\u70e6<\/td>\n<\/tr>\n | \n| \u591a\u7ebf\u7a0b<\/td>\n | \u8fdb\u7a0b\u5185\u591a\u4e2a\u5b50\u4efb\u52a1，\u7b49\u5f85\u65f6\u5207\u6362<\/td>\n | \u8c03\u5ea6\u7531\u64cd\u4f5c\u7cfb\u7edf\u63a7\u5236，\u9700\u9501\u673a\u5236\u4fdd\u62a4\u5171\u4eab\u8d44\u6e90<\/td>\n<\/tr>\n | \n| \u534f\u7a0b<\/td>\n | \u7528\u6237\u6001"\u8f7b\u91cf\u7ea7\u7ebf\u7a0b"，\u8c03\u5ea6\u7531\u7a0b\u5e8f\u5458\/\u8bed\u8a00\u63a7\u5236<\/td>\n | \u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u4f4e，\u9002\u5408 I\/O \u5bc6\u96c6\u3001\u4f4e\u8ba1\u7b97\u91cf\u573a\u666f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecfadbeb.png\") <\/p>\n
\u534f\u7a0b\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u51fd\u6570，\u5b83\u53ef\u4ee5\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u6682\u505c，\u5e76\u5728\u7a0d\u540e\u6062\u590d\u6267\u884c\u3002\u5b83\u4f7f\u7528 async def \u5b9a\u4e49，\u5e76\u5728\u9700\u8981\u6682\u505c\u7684\u5730\u65b9\u4f7f\u7528 await：<\/p>\n import asyncio<\/p>\n # \u5b9a\u4e49\u534f\u7a0b
\nasync def boil_water_async():
\n print("\u5f00\u59cb\u716e\u2f54…")
\n await asyncio.sleep(5) # \u5173\u952e！ await \u8868\u2f70\u201c\u7b49\u5f85\u8fd9\u4e2a\u64cd\u4f5c\u5b8c\u6210，\u4f46\u671f\u95f4\u8ba9\u4e8b\u4ef6\u5faa\u73af\u53bb\u505a\u522b\u7684\u4e8b\u201d
\n print("\u2f54\u5f00\u4e86！")<\/p>\n async def send_message_async():
\n print("\u5f00\u59cb\u53d1\u77ed\u4fe1…")
\n await asyncio.sleep(2) # \u540c\u6837，\u7b49\u5f852\u79d2，\u4f46\u8ba9\u51fa\u63a7\u5236\u6743
\n print("\u77ed\u4fe1\u53d1\u9001\u6210\u529f！")<\/p>\n # \u4e3b\u7a0b\u5e8f（\u4e5f\u662f\u2f00\u4e2a\u534f\u7a0b）
\nasync def main():
\n # \u521b\u5efa\u4e24\u4e2a\u4efb\u52a1，\u5e76\u4ea4\u7ed9\u4e8b\u4ef6\u5faa\u73af\u53bb\u8c03\u5ea6
\n task1 = asyncio.create_task(boil_water_async())
\n task2 = asyncio.create_task(send_message_async())
\n # \u7b49\u5f85\u4e24\u4e2a\u4efb\u52a1\u90fd\u5b8c\u6210
\n await task1
\n await task2<\/p>\n # \u5b83\u8d1f\u8d23\u521b\u5efa\u4e8b\u4ef6\u5faa\u73af，\u5e76\u5c06\u7b2c\u2f00\u4e2a\u534f\u7a0b（\u4e3b\u7a0b\u5e8f）\u653e\u2f0a\u5176\u4e2d\u8fd0\u2f8f\u3002
\nasyncio.run(main()) <\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecfc352a.png\") <\/p>\n
\u603b\u8017\u65f6：5 \u79d2（\u56e0\u4e3a\u4e24\u4e2a\u4efb\u52a1\u7684\u7b49\u5f85\u65f6\u95f4\u662f\u5e76\u53d1\u7684）\u3002<\/p>\n \u901a\u8fc7\u4f7f\u7528 asyncio，\u6211\u4eec\u53ef\u4ee5\u5728\u5355\u7ebf\u7a0b\u4e2d\u540c\u65f6\u5904\u7406\u591a\u4e2a\u4efb\u52a1\u3002\u4e00\u4e2a\u5728\u5355\u7ebf\u7a0b\u5185\u8c03\u5ea6\u548c\u7ba1\u7406\u6240\u6709\u534f\u7a0b\u7684\u6838\u5fc3\u673a\u5236，\u5c31\u662f\u4e8b\u4ef6\u5faa\u73af\u2014\u2014\u5b83\u4e0d\u505c\u5730\u68c0\u67e5\u54ea\u4e9b\u534f\u7a0b\u53ef\u4ee5\u6267\u884c，\u54ea\u4e9b\u5728\u7b49\u5f85\u3002<\/p>\n \n\u6982\u5ff5\u8bf4\u660e<\/tr>\n \n\n| \u534f\u7a0b<\/td>\n | \u7279\u6b8a\u7684\u51fd\u6570，\u53ef\u6682\u505c\/\u6062\u590d，\u7528 async def \u5b9a\u4e49\u3001await \u6682\u505c<\/td>\n<\/tr>\n | \n| asyncio.run()<\/td>\n | \u521b\u5efa\u4e8b\u4ef6\u5faa\u73af，\u8fd0\u884c\u6307\u5b9a\u7684\u534f\u7a0b<\/td>\n<\/tr>\n | \n| \u4e8b\u4ef6\u5faa\u73af<\/td>\n | \u6838\u5fc3\u7ec4\u4ef6，\u8c03\u5ea6\u548c\u6267\u884c\u534f\u7a0b，\u68c0\u67e5\u4efb\u52a1\u72b6\u6001\u5e76\u56de\u8c03<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n3.3 astream() \u5f02\u6b65\u6d41\u5f0f\u4f20\u8f93<\/span><\/h5>\n\u53ef\u4ee5\u4f7f\u7528 .astream() \u65b9\u6cd5\u6765\u5f02\u6b65\u751f\u6210\u6d41\u5f0f\u54cd\u5e94\u7684\u6548\u679c，\u8fd9\u4e13\u4e3a\u975e\u963b\u585e\u5de5\u4f5c\u6d41\u800c\u8bbe\u8ba1：<\/p>\n import os
\nimport asyncio
\nfrom langchain_openai import ChatOpenAI<\/p>\n model = ChatOpenAI(
\n model="deepseek-chat",
\n api_key=os.getenv("DEEPSEEK_API_KEY"),
\n base_url="https:\/\/api.deepseek.com",
\n)<\/p>\n # astream = \u5f02\u6b65\u7248 stream；async for = \u5f02\u6b65\u7248 for
\n# \u597d\u5904：\u7b49\u5f85\u7f51\u7edc\u65f6\u4e0d\u963b\u585e\u7a0b\u5e8f，\u53ef\u4ee5\u540c\u65f6\u5904\u7406\u591a\u4e2a\u8bf7\u6c42（\u9002\u5408\u5e76\u53d1\u573a\u666f）
\nasync def async_stream():
\n print("=== \u5f02\u6b65\u8c03\u7528 ===")
\n async for chunk in model.astream("\u8bb2\u4e00\u4e2a50\u5b57\u7684\u7b11\u8bdd"):
\n print(chunk.content, end="", flush=True)
\n print()<\/p>\n loop = asyncio.new_event_loop() # \u65b0\u5efa\u4e8b\u4ef6\u5faa\u73af
\nloop.run_until_complete(async_stream()) # \u5728\u5faa\u73af\u91cc\u8fd0\u884c\u5f02\u6b65\u51fd\u6570
\nloop.close() # \u7528\u5b8c\u5173\u95ed\u5faa\u73af <\/p>\n 3.4 \u81ea\u5b9a\u4e49\u6d41\u5f0f\u8f93\u51fa\u89e3\u6790\u5668<\/span><\/h5>\n\u4e0a\u9762\u6211\u4eec\u6f14\u793a\u4e86\u5982\u4f55\u8ba9\u804a\u5929\u6a21\u578b\u8fdb\u884c\u6d41\u5f0f\u8f93\u51fa\u3002\u82e5\u6b64\u65f6\u6211\u4eec\u5e0c\u671b\u4fee\u6539\u4e0a\u4e00\u6b65\u7684\u8f93\u51fa\u6837\u5f0f（\u4f8b\u5982\u4ece\u9010\u5b57\u8f93\u51fa\u6539\u4e3a\u9010\u53e5\u8f93\u51fa），\u540c\u65f6\u4fdd\u7559\u6d41\u5f0f\u5904\u7406\u529f\u80fd，\u90a3\u4e48\u6211\u4eec\u9700\u8981\u5728\u94fe\u4e2d\u4f7f\u7528\u751f\u6210\u5668\u51fd\u6570，\u5373\u53ef\u5b8c\u6210\u81ea\u5b9a\u4e49\u6d41\u5f0f\u8f93\u51fa\u7684\u80fd\u529b\u3002<\/p>\n \u8fd8\u8bb0\u5f97\u4e4b\u524d\u8bf4\u8fc7，\u804a\u5929\u6a21\u578b\u7684 .stream() \u65b9\u6cd5\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002\u90a3\u4e48\u6211\u4eec\u5b9e\u73b0\u7684\u8fd9\u4e9b\u751f\u6210\u5668\u7684\u7b7e\u540d\u5e94\u8be5\u662f：Iterator[Input] -> Iterator[Output]；\u5bf9\u4e8e\u5f02\u6b65\u751f\u6210\u5668，\u5219\u4e3a：AsyncIterator[Input] -> AsyncIterator[Output]\u3002<\/p>\n import os
\nfrom langchain_openai import ChatOpenAI
\nfrom langchain_core.output_parsers import StrOutputParser
\nfrom typing import Iterator, List<\/p>\n model = ChatOpenAI(
\n model="deepseek-chat",
\n api_key=os.getenv("DEEPSEEK_API_KEY"),
\n base_url="https:\/\/api.deepseek.com",
\n)<\/p>\n parser = StrOutputParser() # \u628a\u6a21\u578b\u7684 AIMessage \u8f6c\u6210\u7eaf\u5b57\u7b26\u4e32<\/p>\n # \u81ea\u5b9a\u4e49\u751f\u6210\u5668：\u628a\u6d41\u5f0f\u8f93\u51fa\u6309\u53e5\u53f7\u5207\u6210\u53e5\u5b50
\n# \u8f93\u5165：\u4e0a\u4e00\u73af\u8282（parser）\u6d41\u8fc7\u6765\u7684\u5b57\u7b26\u4e32\u5757；\u8f93\u51fa：\u6bcf\u6512\u591f\u4e00\u4e2a\u53e5\u5b50\u5c31 yield \u51fa\u53bb
\ndef split_into_list(input: Iterator[str]) -> Iterator[List[str]]:
\n buffer = "" # \u6512\u5b57\u7f13\u51b2\u533a
\n for chunk in input:
\n buffer += chunk
\n while "\u3002" in buffer: # \u7f13\u51b2\u91cc\u51fa\u73b0\u53e5\u53f7 = \u6512\u591f\u4e00\u4e2a\u5b8c\u6574\u53e5\u5b50
\n stop_index = buffer.index("\u3002")
\n yield [buffer[:stop_index].strip()] # \u53e5\u53f7\u524d\u7684\u90e8\u5206 = \u4e00\u4e2a\u53e5\u5b50，\u4ea7\u51fa！
\n buffer = buffer[stop_index + 1:]
\n if buffer.strip(): # \u6700\u540e\u5269\u4e0b\u7684\u5c3e\u5df4（\u53ef\u80fd\u6ca1\u4ee5\u53e5\u53f7\u7ed3\u5c3e）
\n yield [buffer.strip()]<\/p>\n # \u94fe：\u6a21\u578b \u2192 \u8f6c\u5b57\u7b26\u4e32 \u2192 \u6309\u53e5\u53f7\u5207\u53e5\u5b50
\nchain = model | parser | split_into_list<\/p>\n for chunk in chain.stream("\u5199\u4e00\u4efd\u5173\u4e8e\u7231\u60c5\u7684\u6b4c\u8bcd，\u9700\u89815\u53e5\u8bdd，\u6bcf\u53e5\u8bdd\u7528\u53e5\u53f7\u5206\u5272"):
\n print(chunk, end="|", flush=True) # \u6bcf\u4e2a chunk \u662f\u4e00\u4e2a [\u53e5\u5b50] \u5217\u8868 <\/p>\n 3.5 \u6df1\u5ea6\u63a2\u7d22\u6d41\u5f0f\u4f20\u8f93：SSE \u534f\u8bae<\/span><\/h5>\nHTTP \u534f\u8bae\u672c\u8eab\u8bbe\u8ba1\u4e3a\u65e0\u72b6\u6001\u7684\u8bf7\u6c42-\u54cd\u5e94\u6a21\u5f0f，\u4e25\u683c\u6765\u8bf4，\u65e0\u6cd5\u505a\u5230\u670d\u52a1\u5668\u4e3b\u52a8\u63a8\u9001\u6d88\u606f\u5230\u5ba2\u6237\u7aef\u3002\u4f46\u901a\u8fc7 Server-Sent Events（\u670d\u52a1\u5668\u53d1\u9001\u4e8b\u4ef6，\u7b80\u79f0 SSE） \u6280\u672f\u53ef\u5b9e\u73b0\u6d41\u5f0f\u4f20\u8f93，\u5141\u8bb8\u670d\u52a1\u5668\u4e3b\u52a8\u5411\u6d4f\u89c8\u5668\u63a8\u9001\u6570\u636e\u6d41\u2014\u2014\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u58f0\u660e\u63a5\u4e0b\u6765\u8981\u53d1\u9001\u7684\u662f\u6d41\u6d88\u606f（streaming），\u6b64\u65f6\u5ba2\u6237\u7aef\u4e0d\u4f1a\u5173\u95ed\u8fde\u63a5，\u4f1a\u4e00\u76f4\u7b49\u5f85\u670d\u52a1\u5668\u53d1\u9001\u65b0\u7684\u6570\u636e\u6d41\u3002<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122551-6a9ffecfda7e5.png\") <\/p>\n
\u6838\u5fc3\u7279\u70b9：<\/span><\/p>\n\n\u7279\u70b9\u8bf4\u660e<\/tr>\n \n\n| \u57fa\u4e8e HTTP \u534f\u8bae<\/td>\n | \u590d\u7528\u6807\u51c6 HTTP\/HTTPS，\u65e0\u9700\u989d\u5916\u7aef\u53e3，\u517c\u5bb9\u6027\u597d<\/td>\n<\/tr>\n | \n| \u5355\u5411\u901a\u4fe1\u673a\u5236<\/td>\n | \u4ec5\u652f\u6301\u670d\u52a1\u5668 \u2192 \u5ba2\u6237\u7aef\u7684\u5355\u5411\u63a8\u9001，\u5ba2\u6237\u7aef\u65e0\u6cd5\u7ecf\u540c\u4e00\u8fde\u63a5\u56de\u53d1<\/td>\n<\/tr>\n | \n| \u81ea\u52a8\u91cd\u8fde\u673a\u5236<\/td>\n | \u8fde\u63a5\u4e2d\u65ad\u65f6\u6d4f\u89c8\u5668\u81ea\u52a8\u91cd\u8fde（\u652f\u6301 retry \u5b57\u6bb5\u6307\u5b9a\u95f4\u9694）<\/td>\n<\/tr>\n | \n| \u81ea\u5b9a\u4e49\u6d88\u606f\u7c7b\u578b<\/td>\n | \u54cd\u5e94\u5934\u8bbe\u7f6e Content-Type: text\/event-stream，\u6301\u7eed\u63a8\u9001\u4e8b\u4ef6\u6d41<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u6570\u636e\u683c\u5f0f：<\/p>\n \u670d\u52a1\u7aef\u5411\u6d4f\u89c8\u5668\u53d1\u9001 SSE \u6570\u636e，\u9700\u8981\u8bbe\u7f6e\u5fc5\u8981\u7684 HTTP \u5934\u4fe1\u606f：<\/p>\n Content-Type: text\/event-stream;charset=utf-8
\nConnection: keep-alive <\/p>\n \u6bcf\u4e00\u6b21\u53d1\u9001\u7684\u6d88\u606f\u7531\u82e5\u5e72\u4e2a message \u7ec4\u6210，\u6bcf\u4e2a message \u4e4b\u95f4\u7531 \\\\n\\\\n \u5206\u9694\u3002\u6bcf\u4e2a message \u5185\u90e8\u7531\u82e5\u5e72\u884c\u7ec4\u6210：<\/p>\n [Field]: value\\\\n<\/p>\n event: foo
\ndata: a foo event<\/p>\n data: an unnamed event<\/p>\n event: end
\ndata: a bar event <\/p>\n Field \u53d6\u503c：<\/span><\/p>\n\nField\u8bf4\u660e<\/tr>\n \n\n| data（\u5fc5\u9700）<\/td>\n | \u6570\u636e\u5185\u5bb9<\/td>\n<\/tr>\n | \n| event（\u975e\u5fc5\u9700）<\/td>\n | \u81ea\u5b9a\u4e49\u4e8b\u4ef6\u7c7b\u578b，\u9ed8\u8ba4\u662f message \u4e8b\u4ef6<\/td>\n<\/tr>\n | \n| id（\u975e\u5fc5\u9700）<\/td>\n | \u6570\u636e\u6807\u8bc6\u7b26，\u76f8\u5f53\u4e8e\u6bcf\u6761\u6570\u636e\u7684\u7f16\u53f7<\/td>\n<\/tr>\n | \n| retry（\u975e\u5fc5\u9700）<\/td>\n | \u6307\u5b9a\u6d4f\u89c8\u5668\u91cd\u65b0\u53d1\u8d77\u8fde\u63a5\u7684\u65f6\u95f4\u95f4\u9694<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u9664\u6b64\u4e4b\u5916，\u8fd8\u53ef\u4ee5\u6709\u5192\u53f7（:） \u5f00\u5934\u7684\u884c，\u8868\u793a\u6ce8\u91ca\u3002<\/p>\n LangChain \u6d41\u5f0f\u4f20\u8f93\u6d41\u7a0b\u5206\u6790：LangChain \u672c\u8eab\u5e76\u4e0d"\u521b\u9020"\u6216"\u89c4\u5b9a"\u4e00\u4e2a\u5e95\u5c42\u7684\u7f51\u7edc\u4f20\u8f93\u534f\u8bae，\u800c\u662f\u4f9d\u8d56\u4e8e\u5176\u5e95\u5c42\u7684\u5927\u6a21\u578b\u4f9b\u5e94\u5546（\u5982 OpenAI）\u548c\u6211\u4eec\u81ea\u8eab\u670d\u52a1\u5e94\u7528\u6240\u4f7f\u7528\u7684 Web \u6846\u67b6\u7684\u534f\u8bae\u3002\u56e0\u6b64，\u5bf9\u4e8e LangChain \u7684\u6d41\u5f0f\u4f20\u8f93\u80fd\u529b，\u672c\u8eab\u662f\u56e0\u4e3a\u5927\u6a21\u578b\u4f9b\u5e94\u5546\u63d0\u4f9b\u4e86\u6d41\u5f0f\u4f20\u8f93\u80fd\u529b，\u7531 LangChain \u8fdb\u884c\u8c03\u7528\u540e\u63a5\u6536\u5e76\u5904\u7406\u6210\u4e00\u4e2a\u4e2a\u7684 AIMessageChunk\u3002\u5f53\u6211\u4eec\u53d1\u8d77\u8bf7\u6c42\u65f6，\u4f1a\u5728\u8bf7\u6c42\u4e2d\u8bbe\u7f6e stream=True（_stream() \u6e90\u7801\u4e2d\u7684\u7b2c\u4e00\u6b65），\u8868\u793a\u670d\u52a1\u5668\u5c06\u5728\u751f\u6210\u54cd\u5e94\u65f6\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e（SSE），\u6b64\u65f6 API \u4f1a\u4fdd\u6301 HTTP \u8fde\u63a5\u6253\u5f00，\u5e76\u4ee5\u7279\u5b9a\u683c\u5f0f\u53d1\u9001\u6570\u636e\u3002<\/p>\n
\n\u56db\u3001\u6838\u5fc3\u7ec4\u4ef6：\u6d88\u606f\u4e0e\u5386\u53f2\u7ba1\u7406<\/h3>\n4.1 \u6d88\u606f（Messages）<\/span><\/h5>\n\u6d88\u606f\u662f\u804a\u5929\u6a21\u578b\u4e2d\u7684\u901a\u4fe1\u5355\u4f4d，\u7528\u4e8e\u8868\u793a\u804a\u5929\u6a21\u578b\u7684\u8f93\u5165\u548c\u8f93\u51fa，\u4ee5\u53ca\u53ef\u80fd\u4e0e\u5bf9\u8bdd\u5173\u8054\u7684\u4efb\u4f55\u5176\u4ed6\u4e0a\u4e0b\u6587\u6216\u5143\u6570\u636e\u3002<\/p>\n LLM \u6d88\u606f\u7684\u4e09\u4e2a\u7ec4\u6210\u90e8\u5206：<\/span><\/p>\n\n\u7ec4\u6210\u8bf4\u660e<\/tr>\n \n\n| \u6d88\u606f\u89d2\u8272（Role）<\/td>\n | \u533a\u5206\u5bf9\u8bdd\u4e2d\u4e0d\u540c\u7c7b\u578b\u7684\u6d88\u606f，\u5e2e\u52a9\u6a21\u578b\u4e86\u89e3\u5982\u4f55\u54cd\u5e94<\/td>\n<\/tr>\n | \n| \u6d88\u606f\u5185\u5bb9（Content）<\/td>\n | \u6587\u672c\u6216\u591a\u6a21\u6001\u6570\u636e（\u56fe\u50cf\/\u97f3\u9891\/\u89c6\u9891），\u5927\u591a\u6570\u6a21\u578b\u4ee5\u6587\u672c\u4e3a\u4e3b<\/td>\n<\/tr>\n | \n| \u5176\u4ed6\u5143\u6570\u636e（Additional metadata）<\/td>\n | \u56e0\u6a21\u578b\u800c\u5f02\u7684\u989d\u5916\u4fe1\u606f（\u65f6\u95f4\u6233\u3001\u6a21\u578b\u7279\u5b9a\u53c2\u6570\u7b49）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u6d88\u606f\u89d2\u8272\u8be6\u89e3<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122552-6a9ffed0033be.png\") <\/p>\n
4.2 LangChain \u6d88\u606f<\/span><\/h5>\nLangChain \u63d0\u4f9b\u4e86\u4e00\u79cd\u7edf\u4e00\u7684\u6d88\u606f\u683c\u5f0f，\u53ef\u4ee5\u8de8\u804a\u5929\u6a21\u578b\u4f7f\u7528，\u5141\u8bb8\u7528\u6237\u4f7f\u7528\u4e0d\u540c\u7684\u804a\u5929\u6a21\u578b，\u800c\u65e0\u9700\u62c5\u5fc3\u6bcf\u4e2a\u6a21\u578b\u63d0\u4f9b\u5546\u4f7f\u7528\u7684\u6d88\u606f\u683c\u5f0f\u7684\u5177\u4f53\u7ec6\u8282：<\/p>\n # \u4e0d\u540c\u5382\u5546\u7684\u6a21\u578b，\u8f93\u5165\u8f93\u51fa\u7edf\u4e00\u4f7f\u7528 LangChain \u6d88\u606f\u683c\u5f0f（\u6a21\u578b\u540d\u8bf7\u4ee5\u5404\u5382\u5546\u6700\u65b0\u4e3a\u51c6）
\nopenai_model = init_chat_model("gpt-5.1", model_provider="openai")
\ndeepseek_model = init_chat_model("deepseek-chat", model_provider="deepseek") <\/p>\n \u8fd9\u4e9b\u6a21\u578b\u63d0\u4f9b\u5546\u4e0d\u540c，\u4f46\u5bf9\u4e8e\u5176\u8f93\u5165\u548c\u8f93\u51fa，\u7edf\u4e00\u4f7f\u7528 LangChain \u7684\u6d88\u606f\u683c\u5f0f\u3002\u5b83\u4eec\u90fd\u662f LangChain BaseMessage \u7684\u5b50\u7c7b，\u5168\u90e8\u4f5c\u4e3a LangChain \u804a\u5929\u6a21\u578b\u7684\u8f93\u5165\u548c\u8f93\u51fa\u3002<\/p>\n \n\u6d88\u606f\u7c7b\u578b\u89d2\u8272<\/tr>\n \n\n| BaseMessage<\/td>\n | \u62bd\u8c61\u57fa\u7c7b，\u6240\u6709\u6d88\u606f\u7684\u7236\u7c7b<\/td>\n<\/tr>\n | \n| SystemMessage<\/td>\n | \u7cfb\u7edf\u89d2\u8272，\u8bbe\u5b9a\u5bf9\u8bdd\u4e0a\u4e0b\u6587（\u901a\u5e38\u7b2c\u4e00\u6761）<\/td>\n<\/tr>\n | \n| HumanMessage<\/td>\n | \u7528\u6237\u89d2\u8272，\u7528\u6237\u8f93\u5165<\/td>\n<\/tr>\n | \n| AIMessage<\/td>\n | AI \u89d2\u8272，\u6a21\u578b\u54cd\u5e94（\u53ef\u542b\u5de5\u5177\u8c03\u7528）<\/td>\n<\/tr>\n | \n| ToolMessage<\/td>\n | \u5de5\u5177\u89d2\u8272，\u5de5\u5177\u6267\u884c\u7ed3\u679c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n BaseMessage \u53c2\u6570：<\/span><\/p>\n\n\u53c2\u6570\u8bf4\u660e<\/tr>\n \n\n| content<\/td>\n | \u6d88\u606f\u7684\u5b57\u7b26\u4e32\u5185\u5bb9<\/td>\n<\/tr>\n | \n| additional_kwargs<\/td>\n | \u5176\u4ed6\u6709\u6548\u8f7d\u8377\u6570\u636e，AI \u6d88\u606f\u53ef\u80fd\u542b\u5de5\u5177\u8c03\u7528<\/td>\n<\/tr>\n | \n| response_metadata<\/td>\n | \u54cd\u5e94\u5143\u6570\u636e（\u54cd\u5e94\u5934\u3001\u4ee4\u724c\u8ba1\u6570\u3001\u6a21\u578b\u540d\u79f0\u7b49）<\/td>\n<\/tr>\n | \n| type<\/td>\n | \u6d88\u606f\u7c7b\u578b，\u7528\u4e8e\u53cd\u5e8f\u5217\u5316\u65f6\u8bc6\u522b<\/td>\n<\/tr>\n | \n| name<\/td>\n | \u6d88\u606f\u7684\u4eba\u7c7b\u53ef\u8bfb\u540d\u79f0（\u53ef\u9009）<\/td>\n<\/tr>\n | \n| id<\/td>\n | \u6d88\u606f\u7684\u53ef\u9009\u552f\u4e00\u6807\u8bc6\u7b26<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n BaseMessage \u65b9\u6cd5：<\/span><\/p>\n\n\u65b9\u6cd5\u8bf4\u660e<\/tr>\n \n\n| pretty_print()<\/td>\n | \u6253\u5370\u6d88\u606f\u7684\u6f02\u4eae\u8868\u793a<\/td>\n<\/tr>\n | \n| pretty_repr(html=False)<\/td>\n | \u83b7\u53d6\u6d88\u606f\u7684\u6f02\u4eae\u8868\u793a（\u53ef\u9009 HTML \u683c\u5f0f\u5316）<\/td>\n<\/tr>\n | \n| text()<\/td>\n | \u83b7\u53d6\u6d88\u606f\u7684\u6587\u672c\u5185\u5bb9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n4.3 \u7f13\u5b58\u5386\u53f2\u6d88\u606f（\u591a\u8f6e\u5bf9\u8bdd）<\/h4>\n\u6211\u4eec\u5e38\u5e38\u80fd\u4f53\u9a8c\u5230\u4e0e\u5927\u578b\u8bed\u8a00\u6a21\u578b\u8fdb\u884c\u8fde\u8d2f\u7684\u591a\u8f6e\u5bf9\u8bdd\u7684\u4fbf\u5229\u6027\u3002\u4f46\u76ee\u524d\u6211\u4eec\u7684\u7cfb\u7edf\u8fd8\u4e0d\u652f\u6301\u6b64\u529f\u80fd：<\/p>\n import os
\nfrom langchain_openai import ChatOpenAI
\nfrom langchain_core.messages import HumanMessage<\/p>\n model = ChatOpenAI(
\n model="deepseek-chat",
\n api_key=os.getenv("DEEPSEEK_API_KEY"),
\n base_url="https:\/\/api.deepseek.com",
\n)<\/p>\n # \u7b2c\u4e00\u6b21\u5bf9\u8bdd
\nresult = model.invoke([HumanMessage(content="\u4f60\u597d，\u6211\u53eb\u5c0f\u660e")])
\nresult.pretty_print()
\n# \u7b2c\u4e8c\u6b21\u5bf9\u8bdd
\nresult = model.invoke([HumanMessage(content="\u6211\u53eb\u4ec0\u4e48\u540d\u5b57？")])
\nresult.pretty_print()<\/p>\n ================================== Ai Message ==================================
\n\u4f60\u597d，\u5c0f\u660e！\u5f88\u9ad8\u5174\u8ba4\u8bc6\u4f60！😊
\n================================== Ai Message ==================================
\n\u4f60\u597d！\u6211\u5e76\u4e0d\u77e5\u9053\u4f60\u7684\u540d\u5b57\u54e6～ 😊 <\/p>\n \u53ef\u4ee5\u53d1\u73b0，\u804a\u5929\u6a21\u578b\u5e76\u4e0d\u8ba4\u8bc6\u6211\u4eec，\u66f4\u522b\u8bf4\u652f\u6301\u66f4\u591a\u8f6e\u7684\u5bf9\u8bdd\u4e86\u3002\u7a0d\u4f5c\u4fee\u6539，\u8ba9\u6211\u4eec\u5c06 AI \u56de\u590d\u7ed9\u6211\u4eec\u7684\u54cd\u5e94，\u8ddf\u7740\u65b0\u7684\u7528\u6237\u6d88\u606f\u4e00\u8d77\u53d1\u7ed9\u804a\u5929\u6a21\u578b\u8bd5\u8bd5：<\/p>\n import os
\nfrom langchain_openai import ChatOpenAI
\nfrom langchain_core.messages import HumanMessage, AIMessage<\/p>\n model = ChatOpenAI(
\nmodel="deepseek-chat",
\napi_key=os.getenv("DEEPSEEK_API_KEY"),
\nbase_url="https:\/\/api.deepseek.com",
\n)<\/p>\n # \u8bb0\u5f55\u6d88\u606f：\u628a\u5b8c\u6574\u5bf9\u8bdd\u5386\u53f2（\u542b AI \u4e0a\u6b21\u7684\u56de\u590d）\u90fd\u5217\u51fa\u6765，\u6a21\u578b\u624d\u80fd"\u8bb0\u5f97"
\nmessages = [
\nHumanMessage(content="\u4f60\u597d，\u6211\u53eb\u5c0f\u660e"),
\nAIMessage(content="\u4f60\u597d\u5c0f\u660e！\u6709\u4ec0\u4e48\u53ef\u4ee5\u5e2e\u4f60\u7684\u5417？"),
\nHumanMessage(content="\u6211\u53eb\u4ec0\u4e48\u540d\u5b57？"),
\n]
\nmodel.invoke(messages).pretty_print()<\/p>\n \u4f60\u521a\u624d\u544a\u8bc9\u6211\u4f60\u53eb**\u5c0f\u660e**\u5440！\u5982\u679c\u4e4b\u540e\u60f3\u6539\u79f0\u547c\u6216\u8865\u5145\u5176\u4ed6\u4fe1\u606f，\u968f\u65f6\u544a\u8bc9\u6211\u54e6~ 😄 <\/p>\n \u4ece\u7ed3\u679c\u53ef\u77e5，\u53ea\u8981\u5c06\u5386\u53f2\u6d88\u606f，\u91cd\u65b0\u53d1\u9001\u7ed9\u804a\u5929\u6a21\u578b，\u90a3\u4e48\u5c31\u53ef\u4ee5\u5b9e\u73b0\u591a\u8f6e\u5bf9\u8bdd\u7684\u529f\u80fd\u3002<\/p>\n 4.4 \u7ba1\u7406\u5386\u53f2\u6d88\u606f<\/span><\/h5>\n\u4e0a\u4e0b\u6587\u7a97\u53e3<\/span><\/h5>\n\u7ba1\u7406\u5386\u53f2\u6d88\u606f，\u65e0\u975e\u5c31\u662f\u7406\u89e3\u5982\u4f55"\u7ba1\u7406"，"\u7ba1\u7406"\u4e5f\u5c31\u662f\u4e00\u4e9b CRUD（Create\u3001Read\u3001Update\u3001Delete） \u64cd\u4f5c\u3002\u5728\u4e86\u89e3\u5982\u4f55\u7ba1\u7406\u6d88\u606f\u4e4b\u524d，\u9700\u8981\u5148\u4e86\u89e3\u591a\u8f6e\u5bf9\u8bdd\u7684\u6838\u5fc3\u6982\u5ff5：\u4e0a\u4e0b\u6587\u7a97\u53e3\u3002\u4e0a\u4e0b\u6587\u7a97\u53e3\u53ef\u4ee5\u7406\u89e3\u4e3a\u6a21\u578b\u7684"\u77ed\u671f\u5de5\u4f5c\u8bb0\u5fc6\u533a"，\u5373 LLM \u5728\u4e00\u6b21\u5904\u7406\u8bf7\u6c42\u65f6，\u6240\u80fd\u67e5\u770b\u548c\u5904\u7406\u7684\u6700\u5927 Token \u6570\u91cf，\u5b83\u5305\u542b\u4e86：<\/p>\n \n- \n
\u7528\u6237\u7684\u8f93\u5165<\/p>\n<\/li>\n - \n
\u5927\u6a21\u578b\u7684\u8f93\u51fa<\/p>\n<\/li>\n - \n
\u6709\u65f6\u8fd8\u5305\u62ec\u7cfb\u7edf\u6307\u4ee4（SystemMessage） \u548c\u5bf9\u8bdd\u5386\u53f2<\/p>\n<\/li>\n<\/ul>\n \u4e0d\u540c\u5927\u6a21\u578b\u652f\u6301\u7684\u4e0a\u4e0b\u6587\u7a97\u53e3\u5927\u5c0f\u4e0d\u540c\u3002<\/p>\n Token<\/span><\/h5>\n\u5728\u81ea\u7136\u8bed\u8a00\u5904\u7406（NLP） \u4e2d，Token \u662f\u6587\u672c\u7684\u57fa\u672c\u5355\u4f4d\u3002\u5b83\u4e0d\u662f\u5b8c\u5168\u7b49\u540c\u4e8e\u4e00\u4e2a\u5355\u8bcd\u6216\u4e00\u4e2a\u6c49\u5b57，\u800c\u662f\u4e00\u4e2a\u66f4\u7ec6\u7c92\u5ea6\u7684\u5212\u5206\u3002\u8ba1\u7b97\u673a\u65e0\u6cd5\u76f4\u63a5\u7406\u89e3\u6587\u5b57，\u5b83\u9700\u8981\u5c06\u6587\u672c\u8f6c\u6362\u4e3a\u6570\u5b57（\u5411\u91cf）\u3002Tokenization（\u4ee4\u724c\u5316） \u5c31\u662f\u8fd9\u4e2a\u8f6c\u6362\u8fc7\u7a0b\u7684\u7b2c\u4e00\u6b65，\u5c06\u53e5\u5b50\u5206\u89e3\u6210\u6a21\u578b\u53ef\u4ee5\u7406\u89e3\u548c\u5904\u7406\u7684\u788e\u7247\u3002<\/p>\n \n\u8bed\u8a00Token \u4f30\u7b97<\/tr>\n \n\n| \u82f1\u6587<\/td>\n | 1 \u4e2a Token \u2248 4 \u4e2a\u5b57\u7b26 \/ 0.75 \u4e2a\u5355\u8bcd；1000 Tokens \u2248 750 \u4e2a\u82f1\u6587\u5355\u8bcd<\/td>\n<\/tr>\n | \n| \u4e2d\u6587<\/td>\n | 1 \u4e2a\u6c49\u5b57 \u2248 1.5~2 \u4e2a Tokens；1000 Tokens \u2248 500~700 \u4e2a\u6c49\u5b57<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u4e3e\u4e2a\u4f8b\u5b50：\u4e0a\u4e0b\u6587\u7a97\u53e3\u5c31\u50cf\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u5de5\u4f5c\u53f0，Token \u597d\u6bd4\u79ef\u6728\u96f6\u4ef6，\u5927\u6a21\u578b\u597d\u6bd4\u5de5\u5320\u3002\u5de5\u5320\u9700\u8981\u62fc\u51fa\u4f5c\u54c1，\u5fc5\u987b\u628a\u6240\u9700\u7684\u96f6\u4ef6（\u8f93\u5165\u7684 Token） \u653e\u5728\u5de5\u4f5c\u53f0\u4e0a，\u4e00\u8fb9\u62fc\u88c5（\u751f\u6210\u56de\u590d），\u4e00\u8fb9\u628a\u62fc\u597d\u7684\u90e8\u5206（\u8f93\u51fa\u7684 Token） \u4e5f\u653e\u5728\u5de5\u4f5c\u53f0\u4e0a\u3002\u6574\u4e2a\u8fc7\u7a0b（\u8f93\u5165 + \u8f93\u51fa）\u4e2d，\u5de5\u4f5c\u53f0\u4e0a\u7684\u6240\u6709\u79ef\u6728（Tokens） \u603b\u6570\u90fd\u4e0d\u80fd\u8d85\u8fc7\u5de5\u4f5c\u53f0\u7684\u6700\u5927\u5bb9\u91cf（\u4e0a\u4e0b\u6587\u7a97\u53e3\u5927\u5c0f）\u3002\u5982\u679c\u6700\u521d\u7684\u96f6\u4ef6（\u8f93\u5165） \u592a\u591a，\u5360\u6ee1\u4e86\u5de5\u4f5c\u53f0，\u5de5\u5320\u5c31\u6ca1\u6709\u7a7a\u95f4\u8fdb\u884c\u62fc\u88c5\u4e86，\u8fd9\u65f6\u4f60\u5c31\u9700\u8981\u51cf\u5c11\u96f6\u4ef6（\u7cbe\u7b80\u8f93\u5165）\u3002<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122552-6a9ffed0301b6.png\") <\/p>\n
\u6d88\u606f\u88c1\u526a（trim_messages）<\/span><\/h5>\n\u6709\u4e86\u4e0a\u4e0b\u6587\u7a97\u53e3\u548c Token \u7684\u8ba4\u77e5，\u518d\u6765\u770b\u591a\u8f6e\u5bf9\u8bdd\u7684\u5b9e\u73b0\u539f\u7406，\u5176\u5b9e\u5c31\u662f：<\/p>\n \n- \n
\u8f93\u5165 = \u7cfb\u7edf\u6d88\u606f + \u5bf9\u8bdd\u5386\u53f2 + \u6700\u65b0\u7528\u6237\u95ee\u9898<\/p>\n<\/li>\n - \n
\u5bf9\u4e8e\u6a21\u578b\u6765\u8bf4，\u5e76\u4e0d\u771f\u6b63"\u8bb0\u5fc6"，\u800c\u662f\u6bcf\u6b21\u90fd\u5c06\u5b8c\u6574\u7684\u4e0a\u4e0b\u6587\u91cd\u65b0\u8f93\u5165\u3002<\/p>\n<\/li>\n<\/ul>\n \u7531\u4e8e\u6240\u6709\u6a21\u578b\u7684\u4e0a\u4e0b\u6587\u7a97\u53e3\u5927\u5c0f\u90fd\u662f\u6709\u9650\u7684，\u8fd9\u610f\u5473\u7740\u4f5c\u4e3a\u8f93\u5165\u7684 Token \u6570\u91cf\u4e5f\u662f\u6709\u9650\u7684\u3002\u5982\u679c\u7d2f\u79ef\u4e86\u5f88\u957f\u7684\u6d88\u606f\u5386\u53f2\u8bb0\u5f55，\u5219\u9700\u8981\u7ba1\u7406\u4f20\u9012\u7ed9\u6a21\u578b\u7684\u6d88\u606f\u7684\u957f\u5ea6\u3002trim_messages（LangChain \u63d0\u4f9b）\u53ef\u7528\u4e8e\u5c06\u804a\u5929\u5386\u53f2\u8bb0\u5f55\u7684\u5927\u5c0f\u51cf\u5c0f\u4e3a\u6307\u5b9a\u7684\u4ee4\u724c\u8ba1\u6570\u6216\u6307\u5b9a\u7684\u6d88\u606f\u6570\u91cf\u3002<\/p>\n \u57fa\u4e8e\u8f93\u5165 Token \u6570\u7684\u4fee\u526a：<\/span><\/p>\nimport os
\nfrom langchain_openai import ChatOpenAI
\nfrom langchain_core.messages import (
\n HumanMessage, SystemMessage, AIMessage, trim_messages,
\n)<\/p>\n model = ChatOpenAI(
\n model="deepseek-chat",
\n api_key=os.getenv("DEEPSEEK_API_KEY"),
\n base_url="https:\/\/api.deepseek.com",
\n)<\/p>\n # \u5386\u53f2\u6d88\u606f\u8bb0\u5f55（\u4e00\u957f\u4e32\u5bf9\u8bdd，\u542b"\u4f60\u597d，\u6211\u53eb\u5c0f\u660e"\u2026\u2026"\u6211\u53eb\u4ec0\u4e48\u540d\u5b57？"）
\nmessages = [
\n SystemMessage(content="\u4f60\u662f\u4e00\u4e2a\u597d\u52a9\u624b"),
\n HumanMessage(content="\u4f60\u597d，\u6211\u53eb\u5c0f\u660e"),
\n # \u2026\u2026（\u591a\u8f6e\u5bf9\u8bdd\u5386\u53f2）\u2026\u2026
\n HumanMessage(content="\u6211\u53eb\u4ec0\u4e48\u540d\u5b57？"),
\n]<\/p>\n # \u81ea\u5b9a\u4e49 token \u8ba1\u6570\u51fd\u6570
\n# \u539f\u56e0：token_counter \u76f4\u63a5\u4f20 model \u4f1a\u8c03\u7528 get_num_tokens_from_messages()，
\n# \u8be5\u65b9\u6cd5\u5bf9 deepseek-chat \u672a\u5b9e\u73b0（\u62a5 NotImplementedError），
\n# \u6240\u4ee5\u6539\u4e3a\u9010\u6761\u7528 get_num_tokens()（DeepSeek \u652f\u6301）\u518d\u6c42\u548c
\ndef token_counter(msgs):
\n return sum(model.get_num_tokens(m.content) for m in msgs)<\/p>\n # \u4f7f\u7528 trim_messages \u51cf\u5c11\u53d1\u9001\u7ed9\u6a21\u578b\u7684\u6d88\u606f\u6570\u91cf
\ntrimmer = trim_messages(
\n max_tokens=65, # \u4fee\u526a\u6d88\u606f\u7684\u6700\u5927\u4ee4\u724c\u6570
\n strategy="last", # \u4fee\u526a\u7b56\u7565："last"（\u9ed8\u8ba4）\u4ece\u540e\u5f80\u524d；"first" \u4ece\u524d\u5f80\u540e
\n token_counter=token_counter, # \u7528\u81ea\u5b9a\u4e49\u51fd\u6570\u6570 token
\n include_system=True, # \u59cb\u7ec8\u4fdd\u7559\u521d\u59cb\u7cfb\u7edf\u6d88\u606f
\n allow_partial=False, # \u662f\u5426\u5141\u8bb8\u62c6\u5206\u6d88\u606f\u7684\u5185\u5bb9
\n start_on="human", # \u786e\u4fdd\u7b2c\u4e00\u6761\u975e\u7cfb\u7edf\u6d88\u606f\u59cb\u7ec8\u662f human
\n)<\/p>\n chain = trimmer | model
\nprint(chain.invoke(messages))<\/p>\n content='\u5f88\u62b1\u6b49，\u6211\u4e0d\u77e5\u9053\u60a8\u7684\u540d\u5b57\u3002' <\/p>\n \u53ef\u4ee5\u53d1\u73b0\u4e00\u5f00\u59cb\u4ecb\u7ecd"\u6211\u53eb\u4ec0\u4e48"\u7684\u6d88\u606f\u88ab\u5220\u51cf\u4e86，\u56e0\u6b64 AI \u65e0\u6cd5\u8bc6\u522b\u3002 \u4fee\u526a\u804a\u5929\u8bb0\u5f55\u540e，\u751f\u6210\u7684\u804a\u5929\u8bb0\u5f55（\u8f93\u5165）\u5e94\u8be5\u6709\u6548，\u4f46\u9700\u9075\u5faa\u5bf9\u8bdd\u6a21\u5f0f\u539f\u5219：<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122552-6a9ffed095e14.png\") <\/p>\n
\u4fee\u526a\u540e\u7684\u5bf9\u8bdd\u5fc5\u987b\u9075\u5faa\u7684\u539f\u5219：<\/span><\/p>\n\n\u539f\u5219\u5b9e\u73b0\u65b9\u5f0f<\/tr>\n \n\n| \u4ee5 HumanMessage \u6216 SystemMessage \u5f00\u5934，\u4e14\u540e\u8ddf HumanMessage<\/td>\n | \u8bbe\u7f6e start_on="human"<\/td>\n<\/tr>\n | \n| \u4ee5 HumanMessage \u6216 ToolMessage \u7ed3\u5c3e<\/td>\n | \u8bbe\u7f6e ends_on=("human", "tool")<\/td>\n<\/tr>\n | \n| ToolMessage \u5fc5\u987b\u51fa\u73b0\u5728\u6d89\u53ca\u5de5\u5177\u8c03\u7528\u7684 AIMessage \u4e4b\u540e<\/td>\n | \u2014<\/td>\n<\/tr>\n | \n| \u82e5\u539f\u5386\u53f2\u5b58\u5728 SystemMessage，\u65b0\u5386\u53f2\u5fc5\u987b\u5305\u542b\u5b83<\/td>\n | \u8bbe\u7f6e include_system=True<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u57fa\u4e8e\u6d88\u606f\u6570\u7684\u4fee\u526a：<\/span><\/p>\n\u9664\u4e86\u57fa\u4e8e Token \u7684\u4fee\u526a，\u8fd8\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e token_counter=len \u6765\u6839\u636e\u6d88\u606f\u6570\u91cf\u4fee\u526a\u804a\u5929\u8bb0\u5f55\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b，max_tokens \u5c06\u63a7\u5236\u6700\u5927\u6d88\u606f\u6570（\u5373\u4fdd\u7559\u6700\u8fd1 N \u6761\u6d88\u606f）\u3002<\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122552-6a9ffed0bf095.png\") <\/p>\n
\u6d88\u606f\u8fc7\u6ee4（filter_messages）<\/span><\/h5>\n\u5728\u66f4\u590d\u6742\u573a\u666f\u4e0b，\u6211\u4eec\u53ef\u80fd\u4f7f\u7528\u6d88\u606f\u5217\u8868\u6765\u8ddf\u8e2a\u72b6\u6001，\u4f8b\u5982\u53ea\u5c06\u5b8c\u6574\u6d88\u606f\u5217\u8868\u7684\u5b50\u96c6\u4f20\u9012\u7ed9\u6a21\u578b\u8c03\u7528，\u800c\u975e\u5168\u90e8\u5386\u53f2\u8bb0\u5f55\u3002filter_messages \u65b9\u6cd5\u53ef\u4ee5\u8f7b\u677e\u5730\u6309\u7c7b\u578b\u3001ID \u6216\u540d\u79f0\u8fc7\u6ee4\u6d88\u606f：<\/p>\n from langchain_core.messages import filter_messages<\/p>\n def filter_messages(
\n messages: Iterable[MessageLikeRepresentation],
\n include_types: Optional[Sequence[Union[str, type[BaseMessage]]]] = None, # \u8981\u5305\u542b\u7684\u6d88\u606f\u7c7b\u578b
\n exclude_types: Optional[Sequence[Union[str, type[BaseMessage]]]] = None, # \u8981\u6392\u9664\u7684\u6d88\u606f\u7c7b\u578b
\n include_names: Optional[Sequence[str]] = None, # \u8981\u5305\u542b\u7684\u6d88\u606f\u540d\u79f0
\n exclude_names: Optional[Sequence[str]] = None, # \u8981\u6392\u9664\u7684\u6d88\u606f\u540d\u79f0
\n **kwargs # \u5176\u4ed6\u53ef\u9009\u53c2\u6570（\u5982 include_ids\u3001exclude_ids \u7b49）
\n) -> List[BaseMessage]:<\/p>\n # \u529f\u80fd：
\n# \u6839\u636e\u6d88\u606f\u7c7b\u578b（\u5982 system\u3001human\u3001ai）\u6216\u6d88\u606f\u540d\u79f0\u8fc7\u6ee4\u6d88\u606f\u5217\u8868\u3002
\n# \u5e38\u7528\u4e8e\u4ece\u5bf9\u8bdd\u5386\u53f2\u4e2d\u7b5b\u9009\u51fa\u7279\u5b9a\u89d2\u8272\u7684\u6d88\u606f，\u4ee5\u7cbe\u51c6\u63a7\u5236\u6a21\u578b\u8f93\u5165\u3002<\/p>\n # \u53c2\u6570\u8bf4\u660e：
\n# include_types: \u8981\u5305\u542b\u7684\u6d88\u606f\u7c7b\u578b，\u53ef\u4e3a\u5b57\u7b26\u4e32（'system','human','ai'）\u6216 BaseMessage \u5b50\u7c7b\u3002
\n# exclude_types: \u8981\u6392\u9664\u7684\u6d88\u606f\u7c7b\u578b\u3002
\n# include_names: \u8981\u5305\u542b\u7684\u6d88\u606f\u540d\u79f0（\u5982 "example_user"）\u3002
\n# exclude_names: \u8981\u6392\u9664\u7684\u6d88\u606f\u540d\u79f0\u3002
\n# **kwargs: \u5176\u4ed6\u53ef\u9009\u53c2\u6570（include_ids\u3001exclude_ids\u3001exclude_tool_calls \u7b49），\u7528\u6cd5\u7c7b\u4f3c\u3002<\/p>\n # \u8fd4\u56de\u503c：
\n# List[BaseMessage]：\u8fc7\u6ee4\u540e\u7684\u6d88\u606f\u5217\u8868\u3002
\nfrom langchain_core.messages import (
\n HumanMessage, SystemMessage, AIMessage, filter_messages,
\n)<\/p>\n # \u5386\u53f2\u6d88\u606f\u8bb0\u5f55（\u5e26 id，\u65b9\u4fbf\u6309 id \u7b5b\u9009）
\nmessages = [
\n SystemMessage("\u4f60\u662f\u4e00\u4e2a\u804a\u5929\u52a9\u624b", id="1"),
\n HumanMessage("\u793a\u4f8b\u8f93\u5165", id="2"),
\n AIMessage("\u793a\u4f8b\u8f93\u51fa", id="3"),
\n HumanMessage("\u771f\u5b9e\u8f93\u5165", id="4"),
\n AIMessage("\u771f\u5b9e\u8f93\u51fa", id="5"),
\n]<\/p>\n # \u6309\u7c7b\u578b\u8fdb\u884c\u7b5b\u9009：\u53ea\u4fdd\u7559 human（HumanMessage） \u7c7b\u578b
\nprint(filter_messages(messages, include_types="human"))
\n# \u7ed3\u679c：[HumanMessage(content='\u793a\u4f8b\u8f93\u5165', …, id='2'), HumanMessage(content='\u771f\u5b9e\u8f93\u5165', …, id='4')]<\/p>\n # \u6309\u7c7b\u578b+ID \u8fdb\u884c\u7b5b\u9009：\u4fdd\u7559 human \u548c AI（AIMessage），\u4f46\u6392\u9664 id="3"
\nprint(filter_messages(messages, include_types=[HumanMessage, AIMessage], exclude_ids=["3"]))
\n# \u7ed3\u679c：[HumanMessage(content='\u793a\u4f8b\u8f93\u5165', …, id='2'), HumanMessage(content='\u771f\u5b9e\u8f93\u5165', …, id='4'),
\n# AIMessage(content='\u771f\u5b9e\u8f93\u51fa', …, id='5')] <\/p>\n \u6d88\u606f\u5408\u5e76（merge_message_runs）<\/span><\/h5>\n\u82e5\u6d88\u606f\u5217\u8868\u4e2d\u5b58\u5728\u8fde\u7eed\u76f8\u540c\u7c7b\u578b\u7684\u6d88\u606f，\u4f46\u67d0\u4e9b\u6a21\u578b\u4e0d\u652f\u6301\u4f20\u9012\u76f8\u540c\u7c7b\u578b\u7684\u8fde\u7eed\u6d88\u606f\u3002\u5bf9\u4e8e\u8fd9\u79cd\u60c5\u51b5，\u53ef\u4ee5\u4f7f\u7528 merge_message_runs \u65b9\u6cd5\u8f7b\u677e\u5408\u5e76\u76f8\u540c\u7c7b\u578b\u7684\u8fde\u7eed\u6d88\u606f：<\/p>\n rom langchain_core.messages import merge_message_runs, BaseMessage<\/p>\n def merge_message_runs(
\n messages: Iterable[BaseMessage], # \u5f85\u5408\u5e76\u7684\u6d88\u606f\u5e8f\u5217
\n chunk_separator: str = "\\\\n", # \u5408\u5e76\u65f6\u8fde\u63a5\u6d88\u606f\u5185\u5bb9\u7684\u95f4\u9694\u7b26，\u9ed8\u8ba4\u6362\u884c
\n) -> List[BaseMessage]:<\/p>\n # \u529f\u80fd：
\n# \u5c06\u8fde\u7eed\u7684\u6d88\u606f\u5408\u5e76\u4e3a\u4e00\u6761\u6d88\u606f\u3002\u5982\u679c\u8fde\u7eed\u7684\u591a\u4e2a\u6d88\u606f\u5177\u6709\u76f8\u540c\u7684\u7c7b\u578b（\u5982 HumanMessage\u3001AIMessage \u7b49），
\n# \u5219\u5c06\u5176\u5185\u5bb9\u8fde\u63a5\u5728\u4e00\u8d77，\u5f62\u6210\u4e00\u6761\u5408\u5e76\u540e\u7684\u6d88\u606f，\u4ee5\u7b80\u5316\u5bf9\u8bdd\u5386\u53f2\u5e76\u51cf\u5c11 API \u8c03\u7528\u5f00\u9500\u3002
\n# \u5e38\u89c1\u573a\u666f：\u5c06\u7528\u6237\u591a\u8f6e\u8fde\u7eed\u8f93\u5165\u5408\u5e76\u4e3a\u4e00\u4e2a HumanMessage，\u6216\u5c06\u6a21\u578b\u8fde\u7eed\u8f93\u51fa\u5408\u5e76\u4e3a\u4e00\u4e2a AIMessage\u3002<\/p>\n # \u53c2\u6570\u8bf4\u660e：
\n# messages: \u5f85\u5408\u5e76\u7684\u6d88\u606f\u5bf9\u8c61\u5217\u8868\u3002
\n# chunk_separator: \u5408\u5e76\u65f6\u7528\u4e8e\u8fde\u63a5\u591a\u6761\u6d88\u606f\u5185\u5bb9\u7684\u95f4\u9694\u5b57\u7b26\u4e32，\u9ed8\u8ba4\u4e3a\u6362\u884c\u7b26 "\\\\n"\u3002<\/p>\n # \u8fd4\u56de\u503c：
\n# List[BaseMessage]：\u5408\u5e76\u540e\u7684\u6d88\u606f\u5217\u8868（\u76f8\u90bb\u540c\u7c7b\u578b\u6d88\u606f\u88ab\u5408\u5e76）\u3002
\nimport os
\nfrom langchain_openai import ChatOpenAI
\nfrom langchain_core.messages import (
\n HumanMessage, SystemMessage, AIMessage, merge_message_runs,
\n)<\/p>\n model = ChatOpenAI(
\n model="deepseek-chat",
\n api_key=os.getenv("DEEPSEEK_API_KEY"),
\n base_url="https:\/\/api.deepseek.com",
\n)<\/p>\n # \u5386\u53f2\u6d88\u606f\u8bb0\u5f55（\u5b58\u5728\u8fde\u7eed\u7684\u540c\u7c7b\u578b\u6d88\u606f，\u4f1a\u88ab\u5408\u5e76）
\nmessages = [
\n SystemMessage("\u4f60\u662f\u4e00\u4e2a\u804a\u5929\u52a9\u624b\u3002"),
\n SystemMessage("\u4f60\u603b\u662f\u4ee5\u7b11\u8bdd\u56de\u5e94\u3002"),
\n HumanMessage("\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528 LangChain?"),
\n HumanMessage("\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528 LangGraph?"),
\n AIMessage("\u56e0\u4e3a\u5f53\u4f60\u8bd5\u56fe\u8ba9\u4f60\u7684\u4ee3\u7801\u66f4\u6709\u6761\u7406\u65f6，LangGraph \u4f1a\u8ba9\u4f60\u611f\u5230"\u8282\u70b9"\u662f\u4e2a\u597d\u4e3b\u610f！"),
\n AIMessage("\u4e0d\u8fc7\u522b\u62c5\u5fc3，\u5b83\u4e0d\u4f1a"\u5206\u6563"\u4f60\u7684\u6ce8\u610f\u529b！"),
\n HumanMessage("\u9009\u62e9LangChain\u8fd8\u662fLangGraph?"),
\n]<\/p>\n # \u65b9\u5f0f\u4e00：\u76f4\u63a5\u8c03\u7528\u51fd\u6570\u5408\u5e76（\u4e0d\u5efa\u94fe）
\nmerged = merge_message_runs(messages) # \u628a\u8fde\u7eed\u540c\u7c7b\u578b\u6d88\u606f\u5408\u5e76（\u7ed3\u679c\u5b58\u5728 merged \u91cc）
\nmodel.invoke(messages).pretty_print() # \u76f4\u63a5\u8c03\u6a21\u578b（\u5408\u5e76\u4e0e\u5426，\u6a21\u578b\u56de\u7b54\u4e00\u6837）<\/p>\n # \u65b9\u5f0f\u4e8c：\u628a\u5408\u5e76\u5668\u63a5\u8fdb\u94fe\u91cc（Runnable \u5199\u6cd5）
\nmerger = merge_message_runs() # \u4e0d\u4f20 messages，\u5148\u6784\u9020\u5408\u5e76\u5668（\u53ef\u590d\u7528，\u5408\u5e76\u201c\u8fde\u7eed\u76f8\u90bb\u201d\u7684\u76f8\u540c\u7c7b\u578b\u6d88\u606f）
\nchain = merger | model # \u94fe：\u5148\u5408\u5e76\u6d88\u606f \u2192 \u518d\u8c03\u6a21\u578b
\nchain.invoke(messages).pretty_print() # \u6548\u679c\u548c\u65b9\u5f0f\u4e00\u7b49\u4ef7，\u4f46\u53ef\u4ee5\u7ee7\u7eed\u5f80\u540e\u63a5\u5176\u4ed6\u73af\u8282 <\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122552-6a9ffed0e3815.png\") <\/p>\n
\n\u4e94\u3001\u590d\u76d8（\u9644\u7b54\u6848）<\/h3>\n💡 \u601d\u8003\u9898<\/h4>\n- \n
with_structured_output \u662f\u4ec0\u4e48？\u5b83\u652f\u6301\u54ea\u4e09\u79cd\u8f93\u51fa\u7ed3\u6784？\u7528 DeepSeek \u65f6\u5fc5\u987b\u6307\u5b9a\u54ea\u4e2a method，\u4e3a\u4ec0\u4e48？<\/p>\n<\/li>\n - \n
include_raw \u548c strict \u53c2\u6570\u5404\u6709\u4ec0\u4e48\u4f5c\u7528？<\/p>\n<\/li>\n - \n
invoke \u548c stream \u6709\u4ec0\u4e48\u533a\u522b？AIMessageChunk \u662f\u4ec0\u4e48？<\/p>\n<\/li>\n - \n
\u540c\u6b65\u3001\u591a\u8fdb\u7a0b\u3001\u591a\u7ebf\u7a0b\u3001\u534f\u7a0b\u6709\u4ec0\u4e48\u533a\u522b？\u4e3a\u4ec0\u4e48\u8bf4\u534f\u7a0b\u9002\u5408 I\/O \u5bc6\u96c6\u573a\u666f？<\/p>\n<\/li>\n - \n
\u4e3a\u4ec0\u4e48\u804a\u5929\u6a21\u578b"\u8bb0\u4e0d\u4f4f"\u5386\u53f2？\u591a\u8f6e\u5bf9\u8bdd\u7684\u5b9e\u73b0\u539f\u7406\u662f\u4ec0\u4e48？trim_messages \/ filter_messages \/ merge_message_runs \u5404\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898？<\/p>\n<\/li>\n 📝 \u7b54\u6848<\/h4>\n - \n
with_structured_output \u662f\u804a\u5929\u6a21\u578b\u7684\u65b9\u6cd5：\u4f20\u5165\u8f93\u51fa\u7ed3\u6784，\u8fd4\u56de\u4e00\u4e2a\u6267\u884c\u540e\u8f93\u51fa"\u5bf9\u8c61\/\u5b57\u5178"\u800c\u975e\u5b57\u7b26\u4e32\u7684 Runnable\u3002\u4e09\u79cd\u7ed3\u6784：Pydantic（\u8fd4\u56de\u5bf9\u8c61）\u3001TypedDict（\u8fd4\u56de\u5b57\u5178）\u3001JSON Schema（\u8fd4\u56de\u5b57\u5178）\u3002\u7528 DeepSeek \u5fc5\u987b\u6307\u5b9a method="function_calling"，\u56e0\u4e3a\u9ed8\u8ba4\u7684 json_schema \u65b9\u5f0f DeepSeek \u4e0d\u652f\u6301（\u4f1a 400 \u62a5\u9519）\u3002<\/p>\n<\/li>\n - \n
include_raw=True：\u8fd4\u56de\u542b raw（\u539f\u59cb BaseMessage）\u3001parsed（\u89e3\u6790\u7ed3\u679c）\u3001parsing_error（\u89e3\u6790\u5f02\u5e38）\u4e09\u4e2a\u952e\u7684\u5b57\u5178，\u89e3\u6790\u51fa\u9519\u4e5f\u88ab\u6355\u83b7\u800c\u4e0d\u629b\u5f02\u5e38；strict=True：\u4fdd\u8bc1\u6a21\u578b\u8f93\u51fa\u4e0e schema \u5b8c\u5168\u5339\u914d，\u8f93\u5165 schema \u4e5f\u4f1a\u88ab\u9a8c\u8bc1\u3002<\/p>\n<\/li>\n - \n
invoke \u7b49\u6a21\u578b\u5168\u90e8\u751f\u6210\u5b8c，\u4e00\u6b21\u6027\u8fd4\u56de\u5168\u91cf\u5185\u5bb9（\u50cf\u6536\u5feb\u9012）；stream \u9010\u5757\u8fd4\u56de，\u6bcf\u5757\u662f\u4e00\u4e2a AIMessageChunk（AIMessage \u7684\u4e00\u90e8\u5206\/\u6d88\u606f\u5757），\u53ef\u5b9e\u65f6\u663e\u793a\u6216\u7528 for \u5faa\u73af\u6536\u96c6\u62fc\u63a5\u3002AIMessageChunk \u652f\u6301\u76f8\u52a0\u5408\u5e76\u6210\u5b8c\u6574\u6d88\u606f\u3002<\/p>\n<\/li>\n - \n
\u540c\u6b65：\u4e00\u4ef6\u4e8b\u505a\u5b8c\u518d\u505a\u4e0b\u4e00\u4ef6，\u7b49\u5f85\u65f6\u963b\u585e；\u591a\u8fdb\u7a0b：\u591a\u6838\u5e76\u884c，\u8fdb\u7a0b\u95f4\u901a\u4fe1\u9ebb\u70e6；\u591a\u7ebf\u7a0b：\u8fdb\u7a0b\u5185\u591a\u4efb\u52a1，OS \u8c03\u5ea6，\u9700\u9501\u4fdd\u62a4\u5171\u4eab\u8d44\u6e90；\u534f\u7a0b：\u7528\u6237\u6001"\u8f7b\u91cf\u7ea7\u7ebf\u7a0b"，\u7a0b\u5e8f\u5458\/\u8bed\u8a00\u63a7\u5236\u5207\u6362，\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\u4f4e，I\/O \u5bc6\u96c6（\u5982\u7f51\u7edc\u8bf7\u6c42）\u65f6\u7528 async def + await \u8ba9\u4e8b\u4ef6\u5faa\u73af\u53bb\u8c03\u5ea6\u5176\u4ed6\u4efb\u52a1，\u9002\u5408\u5e76\u53d1\u7b49\u5f85\u573a\u666f\u3002<\/p>\n<\/li>\n - \n
\u804a\u5929\u6a21\u578b\u672c\u8eab\u4e0d\u8bb0\u5fc6\u2014\u2014\u6bcf\u6b21\u8c03\u7528\u53ea\u770b\u5230\u5f53\u6b21\u8f93\u5165\u3002\u591a\u8f6e\u5bf9\u8bdd\u7684\u539f\u7406\u662f\u628a\u5b8c\u6574\u5386\u53f2（\u542b AI \u5386\u53f2\u56de\u590d）\u91cd\u65b0\u53d1\u9001\u7ed9\u6a21\u578b\u3002\u4e09\u4e2a\u5de5\u5177：trim_messages \u628a\u8fc7\u957f\u5386\u53f2\u88c1\u526a\u5230\u6307\u5b9a Token \u6570\/\u6d88\u606f\u6570（\u9632\u6b62\u8d85\u51fa\u4e0a\u4e0b\u6587\u7a97\u53e3）；filter_messages \u6309\u7c7b\u578b\/ID\/\u540d\u79f0\u8fc7\u6ee4\u51fa\u9700\u8981\u7684\u6d88\u606f\u5b50\u96c6；merge_message_runs \u5408\u5e76\u8fde\u7eed\u7684\u540c\u7c7b\u578b\u6d88\u606f（\u6709\u4e9b\u6a21\u578b\u4e0d\u652f\u6301\u8fde\u7eed\u540c\u7c7b\u578b\u6d88\u606f）\u3002<\/p>\n<\/li>\n
\n\u00a0🎯 \u95ed\u5e55<\/h3>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122553-6a9ffed11e44f.jpg\") <\/p>\n
\u4ece"\u7ed3\u6784\u5316\u8f93\u51fa"\u5230"\u6d41\u5f0f\u4f20\u8f93"，\u4ece"\u6d88\u606f\u683c\u5f0f"\u5230"\u5386\u53f2\u7ba1\u7406"\u2014\u2014\u8fd9\u4e00\u7bc7\u5e2e\u4f60\u628a LangChain \u7684\u8fdb\u9636\u7528\u6cd5\u8d70\u4e86\u4e00\u904d\u3002<\/p>\n \u5982\u679c\u672c\u6587\u5bf9\u4f60\u6709\u5e2e\u52a9，\u6b22\u8fce：<\/p>\n 👍 \u70b9\u8d5e ｜ \u2b50 \u6536\u85cf ｜ 👤 \u5173\u6ce8\u4f5c\u8005 ｜ 💬 \u7559\u8a00\u4ea4\u6d41\u4f60\u7684\u7591\u95ee\u6216\u8865\u5145<\/p>\n \u4f60\u7684\u6bcf\u4e00\u6b21\u4e92\u52a8\u90fd\u662f\u6211\u7ee7\u7eed\u66f4\u65b0\u7684\u52a8\u529b，\u6211\u4eec\u4e0b\u4e00\u7bc7\u89c1！🚀<\/p>\n","protected":false},"excerpt":{"rendered":" 👋 \u6b22\u8fce\u9605\u8bfb 🏠\u4e2a\u4eba\u4e3b\u9875：\u613f\u65d6\u65ce 📘\u4e13\u680f\u4f20\u9001\u95e8：\u7b97\u6cd5\u4e13\u680f 💻\u5f53\u524d\u5b66\u4e60\u5185\u5bb9：LangChain 📑 \u76ee\u5f55 \u4e00\u3001\u524d\u7f6e\u8bb2\u89e3 \u4e8c\u3001\u804a\u5929\u6a21\u578b：\u7ed3\u6784\u5316\u8f93\u51fa \u4e09\u3001\u804a\u5929\u6a21\u578b：\u6d41\u5f0f\u4f20\u8f93 \u56db\u3001\u6838\u5fc3\u7ec4\u4ef6：\u6d88\u606f\u4e0e\u5386\u53f2\u7ba1\u7406 \u4e94\u3001\u590d\u76d8（\u9644\u7b54\u6848） \u4e00\u3001\u524d\u7f6e\u8bb2\u89e3
\n\u5728\u8fdb\u5165\u6b63\u6587\u524d，\u5148\u82b1 10 \u79d2\u4e86<\/p>\n","protected":false},"author":2,"featured_media":102441,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[9098,66,997,50,371,305],"topic":[],"class_list":["post-102461","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-it","tag-ai","tag-langchain","tag-50","tag-371","tag-305"],"yoast_head":"\n \u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/102461.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"👋 \u6b22\u8fce\u9605\u8bfb 🏠\u4e2a\u4eba\u4e3b\u9875：\u613f\u65d6\u65ce 📘\u4e13\u680f\u4f20\u9001\u95e8：\u7b97\u6cd5\u4e13\u680f 💻\u5f53\u524d\u5b66\u4e60\u5185\u5bb9：LangChain 📑 \u76ee\u5f55 \u4e00\u3001\u524d\u7f6e\u8bb2\u89e3 \u4e8c\u3001\u804a\u5929\u6a21\u578b：\u7ed3\u6784\u5316\u8f93\u51fa \u4e09\u3001\u804a\u5929\u6a21\u578b：\u6d41\u5f0f\u4f20\u8f93 \u56db\u3001\u6838\u5fc3\u7ec4\u4ef6：\u6d88\u606f\u4e0e\u5386\u53f2\u7ba1\u7406 \u4e94\u3001\u590d\u76d8（\u9644\u7b54\u6848） \u4e00\u3001\u524d\u7f6e\u8bb2\u89e3 \u5728\u8fdb\u5165\u6b63\u6587\u524d，\u5148\u82b1 10 \u79d2\u4e86\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/102461.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-08T12:25:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122549-6a9ffecde830b.jpg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"14 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/102461.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/102461.html\",\"name\":\"\u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-09-08T12:25:54+00:00\",\"dateModified\":\"2026-09-08T12:25:54+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/102461.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/102461.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/102461.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/102461.html","og_locale":"zh_CN","og_type":"article","og_title":"\u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"👋 \u6b22\u8fce\u9605\u8bfb 🏠\u4e2a\u4eba\u4e3b\u9875：\u613f\u65d6\u65ce 📘\u4e13\u680f\u4f20\u9001\u95e8：\u7b97\u6cd5\u4e13\u680f 💻\u5f53\u524d\u5b66\u4e60\u5185\u5bb9：LangChain 📑 \u76ee\u5f55 \u4e00\u3001\u524d\u7f6e\u8bb2\u89e3 \u4e8c\u3001\u804a\u5929\u6a21\u578b：\u7ed3\u6784\u5316\u8f93\u51fa \u4e09\u3001\u804a\u5929\u6a21\u578b：\u6d41\u5f0f\u4f20\u8f93 \u56db\u3001\u6838\u5fc3\u7ec4\u4ef6：\u6d88\u606f\u4e0e\u5386\u53f2\u7ba1\u7406 \u4e94\u3001\u590d\u76d8（\u9644\u7b54\u6848） \u4e00\u3001\u524d\u7f6e\u8bb2\u89e3 \u5728\u8fdb\u5165\u6b63\u6587\u524d，\u5148\u82b1 10 \u79d2\u4e86","og_url":"https:\/\/www.wsisp.com\/helps\/102461.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-09-08T12:25:54+00:00","og_image":[{"url":"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122549-6a9ffecde830b.jpg"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"14 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/102461.html","url":"https:\/\/www.wsisp.com\/helps\/102461.html","name":"\u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-09-08T12:25:54+00:00","dateModified":"2026-09-08T12:25:54+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/102461.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/102461.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/102461.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u3010LangChain\u5b9e\u6218\u3011LangChain \u5b66\u4e60\u7b14\u8bb0\uff08\u4e8c\uff09\uff1a\u7ed3\u6784\u5316\u8f93\u51fa\u3001\u6d41\u5f0f\u4f20\u8f93\u4e0e\u6d88\u606f\u7ba1\u7406"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/102461","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=102461"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/102461\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media\/102441"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=102461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=102461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=102461"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=102461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} | | | | | | | | | | | | | |
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122549-6a9ffecde830b.jpg\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260908122550-6a9ffece86298.png\")
\u200b<\/p>\n