背景描述
LangChain的社区提供了很多封装好的工具，可以直接拿来用（有的需要申请和配置API KEY）
安装依赖
pip install --upgrade --quiet langchain-core langchain langchain-openai
编写代码
这里使用 DuckDuckGoSearchRun的搜索功能，可以帮助我们调用 DuckDuck的搜索引擎。
from langchain.tools import DuckDuckGoSearchRun from langchain_core.output_parsers import StrOutputParser from langchain_core.prompts import ChatPromptTemplate from langchain_openai import ChatOpenAI search = DuckDuckGoSearchRun() template = """turn the following user input into a search query for a search engine: {input}""" prompt = ChatPromptTemplate.from_template(template) # 使用GPT-4-Turbo 3.5完成的效果不好 model = ChatOpenAI( model="gpt-4-0125-preview" ) chain = prompt | model | StrOutputParser() | search message1 = chain.invoke({"input": "I'd like to figure out what games are tonight"}) print(f"message1: {message1}")
此外，它的工具包中，还封装了这些
__all__ = [ "AINAppOps", "AINOwnerOps", "AINRuleOps", "AINTransfer", "AINValueOps", "AIPluginTool", "APIOperation", "ArxivQueryRun", "AzureCogsFormRecognizerTool", "AzureCogsImageAnalysisTool", "AzureCogsSpeech2TextTool", "AzureCogsText2SpeechTool", "BaseGraphQLTool", "BaseRequestsTool", "BaseSQLDatabaseTool", "BaseSparkSQLTool", "BaseTool", "BingSearchResults", "BingSearchRun", "BraveSearch", "ClickTool", "CopyFileTool", "CurrentWebPageTool", "DeleteFileTool", "DuckDuckGoSearchResults", "DuckDuckGoSearchRun", "EdenAiExplicitImageTool", "EdenAiObjectDetectionTool", "EdenAiParsingIDTool", "EdenAiParsingInvoiceTool", "EdenAiTextToSpeechTool", "EdenAiSpeechToTextTool", "EdenAiTextModerationTool", "EdenaiTool", "ElevenLabsText2SpeechTool", "ExtractHyperlinksTool", "ExtractTextTool", "FileSearchTool", "GetElementsTool", "GmailCreateDraft", "GmailGetMessage", "GmailGetThread", "GmailSearch", "GmailSendMessage", "GooglePlacesTool", "GoogleSearchResults", "GoogleSearchRun", "GoogleSerperResults", "GoogleSerperRun", "HumanInputRun", "IFTTTWebhook", "InfoPowerBITool", "InfoSQLDatabaseTool", "InfoSparkSQLTool", "JiraAction", "JsonGetValueTool", "JsonListKeysTool", "ListDirectoryTool", "ListPowerBITool", "ListSQLDatabaseTool", "ListSparkSQLTool", "MetaphorSearchResults", "MoveFileTool", "NavigateBackTool", "NavigateTool", "O365SearchEmails", "O365SearchEvents", "O365CreateDraftMessage", "O365SendMessage", "O365SendEvent", "authenticate", "OpenAPISpec", "OpenWeatherMapQueryRun", "PubmedQueryRun", "PythonAstREPLTool", "PythonREPLTool", "QueryCheckerTool", "QueryPowerBITool", "QuerySQLCheckerTool", "QuerySQLDataBaseTool", "QuerySparkSQLTool", "ReadFileTool", "RequestsDeleteTool", "RequestsGetTool", "RequestsPatchTool", "RequestsPostTool", "RequestsPutTool", "SceneXplainTool", "SearxSearchResults", "SearxSearchRun", "ShellTool", "SleepTool", "StdInInquireTool", "SteamshipImageGenerationTool", "StructuredTool", "Tool", "VectorStoreQATool", "VectorStoreQAWithSourcesTool", "WikipediaQueryRun", "WolframAlphaQueryRun", "WriteFileTool", "YouTubeSearchTool", "ZapierNLAListActions", "ZapierNLARunAction", "tool", "format_tool_to_openai_function", "BearlyInterpreterTool", ]
运行结果
➜ python3 test16.py /Users/wuzikang/Desktop/py/langchain_test/own_learn/env/lib/python3.12/site-packages/langchain/tools/__init__.py:63: LangChainDeprecationWarning: Importing tools from langchain is deprecated. Importing from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead: `from langchain_community.tools import DuckDuckGoSearchRun`. To install langchain-community run `pip install -U langchain-community`. warnings.warn( message1: How to live stream NBA games tonight. Pelicans vs Thunder and Clippers vs Lakers will air on ESPN. Viewers can also stream NBA games on Sling TV. Fans in the U.S. can watch the biggest games of ... NBA Games on TV Tonight - 2023-2024 NBA TV Schedule What Channel and Time is NBA Games on TV Today, Tonight, Tomorrow? Watch and Stream live NBA games on TV tonight and today. NBA games are broadcast on ABC, ESPN, TNT, NBATV and local networks. NBA on TV Sunday, 3/17/2024. NBA REGULAR SEASON TIME ET TV; Phoenix at Milwaukee: What Channel and Time do NHL Games Play on TV Today, Tonight, Tomorrow? Watch and stream NHL live games today on TV. 2023-24 NHL TV Schedule for tonight includes games on ABC, ESPN, TNT, TBS & Hulu. NHL on TV Sunday, 3/17/2024. NHL REGULAR SEASON TIME ET TV; NY Islanders at NY Rangers: 1:00pm: TNT: New Jersey at Vegas: 3:30pm: TNT: The web page shows the schedule of NFL Network programs for the next two weeks. There are no games on tonight, only replays of previous games and shows. Tonight's schedule features two primetime games. The Tennessee Titans take on the Miami Dolphins at Hard Rock Stadium and the Green Bay Packers face the New York Giants at MetLife. Both games take place at 8:15 PM. ... One regular season game and one NFL Playoff game will only be available to Peacock subscribers. The first game will take ...
