GraphQL
GraphQL 是一种用于 API 的查询语言和一个运行时,用于针对您的数据执行这些查询。
GraphQL
提供了 API 中数据的完整且易于理解的描述,赋予客户端索取所需内容的能力,并且不会更多,使 API 随着时间的推移更容易演变,并支持强大的开发人员工具。
通过在提供给代理的工具列表中包含一个BaseGraphQLTool
,您可以授予您的代理从 GraphQL API 查询数据的能力,以满足您的任何需求。
此 Jupyter 笔记本演示了如何将GraphQLAPIWrapper
组件与代理一起使用。
在此示例中,我们将使用以下端点提供的公共Star Wars GraphQL API
:https://swapi-graphql.netlify.app/.netlify/functions/index.
首先,您需要安装httpx
和gql
Python 包。
pip install httpx gql > /dev/null
%pip install --upgrade --quiet langchain-community
现在,让我们使用指定的 Star Wars API 端点创建一个 BaseGraphQLTool 实例,并使用该工具初始化一个代理。
from langchain.agents import AgentType, initialize_agent, load_tools
from langchain_openai import OpenAI
llm = OpenAI(temperature=0)
tools = load_tools(
["graphql"],
graphql_endpoint="https://swapi-graphql.netlify.app/.netlify/functions/index",
)
agent = initialize_agent(
tools, llm, agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION, verbose=True
)
现在,我们可以使用代理对 Star Wars GraphQL API 运行查询。让我们要求代理列出所有 Star Wars 电影及其上映日期。
graphql_fields = """allFilms {
films {
title
director
releaseDate
speciesConnection {
species {
name
classification
homeworld {
name
}
}
}
}
}
"""
suffix = "Search for the titles of all the stawars films stored in the graphql database that has this schema "
agent.run(suffix + graphql_fields)
[1m> Entering new AgentExecutor chain...[0m
[32;1m[1;3m I need to query the graphql database to get the titles of all the star wars films
Action: query_graphql
Action Input: query { allFilms { films { title } } }[0m
Observation: [36;1m[1;3m"{\n \"allFilms\": {\n \"films\": [\n {\n \"title\": \"A New Hope\"\n },\n {\n \"title\": \"The Empire Strikes Back\"\n },\n {\n \"title\": \"Return of the Jedi\"\n },\n {\n \"title\": \"The Phantom Menace\"\n },\n {\n \"title\": \"Attack of the Clones\"\n },\n {\n \"title\": \"Revenge of the Sith\"\n }\n ]\n }\n}"[0m
Thought:[32;1m[1;3m I now know the titles of all the star wars films
Final Answer: The titles of all the star wars films are: A New Hope, The Empire Strikes Back, Return of the Jedi, The Phantom Menace, Attack of the Clones, and Revenge of the Sith.[0m
[1m> Finished chain.[0m
'The titles of all the star wars films are: A New Hope, The Empire Strikes Back, Return of the Jedi, The Phantom Menace, Attack of the Clones, and Revenge of the Sith.'