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小铭 cf5803e44c Add ToolException that a tool can throw. (#5050) ... # Add ToolException that a tool can throw This is an optional exception that tool throws when execution error occurs. When this exception is thrown, the agent will not stop working,but will handle the exception according to the handle_tool_error variable of the tool,and the processing result will be returned to the agent as observation,and printed in pink on the console.It can be used like this: ```python from langchain.schema import ToolException from langchain import LLMMathChain, SerpAPIWrapper, OpenAI from langchain.agents import AgentType, initialize_agent from langchain.chat_models import ChatOpenAI from langchain.tools import BaseTool, StructuredTool, Tool, tool from langchain.chat_models import ChatOpenAI llm = ChatOpenAI(temperature=0) llm_math_chain = LLMMathChain(llm=llm, verbose=True) class Error_tool: def run(self, s: str): raise ToolException('The current search tool is not available.') def handle_tool_error(error) -> str: return "The following errors occurred during tool execution:"+str(error) search_tool1 = Error_tool() search_tool2 = SerpAPIWrapper() tools = [ Tool.from_function( func=search_tool1.run, name="Search_tool1", description="useful for when you need to answer questions about current events.You should give priority to using it.", handle_tool_error=handle_tool_error, ), Tool.from_function( func=search_tool2.run, name="Search_tool2", description="useful for when you need to answer questions about current events", return_direct=True, ) ] agent = initialize_agent(tools, llm, agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION, verbose=True, handle_tool_errors=handle_tool_error) agent.run("Who is Leo DiCaprio's girlfriend? What is her current age raised to the 0.43 power?") ```  ## Who can review? - @vowelparrot --------- Co-authored-by: Dev 2049 <dev.dev2049@gmail.com>		1 year ago
..
_static	docs: Big Mendable Improvements (#4964)	1 year ago
additional_resources	docs: `Deployments` page moved into `Ecosystem/` (#4949)	1 year ago
ecosystem	Add Chainlit to deployment options (#5314)	1 year ago
getting_started	docs: added link to LangChain Handbook (#5311)	1 year ago
integrations	docs: `ecosystem/integrations` update 1 (#5219)	1 year ago
modules	Add ToolException that a tool can throw. (#5050)	1 year ago
reference	docs: compound ecosystem and integrations (#4870)	1 year ago
tracing	Some notebook and client fixes (add retries, clean up docs, etc) (#4820)	1 year ago
use_cases	Fixed typo: 'ouput' to 'output' in all documentation (#5272)	1 year ago
Makefile	Feature: linkcheck-action (#534) (#542)	2 years ago
conf.py	docs: Mendable Search integration (#2803)	2 years ago
dependents.md	docs: added `ecosystem/dependents` page (#4941)	1 year ago
index.rst	docs: `Deployments` page moved into `Ecosystem/` (#4949)	1 year ago
integrations.rst	docs: `ecosystem/integrations` update 1 (#5219)	1 year ago
make.bat	initial commit	2 years ago
reference.rst	docs: `Deployments` page moved into `Ecosystem/` (#4949)	1 year ago
requirements.txt	Harrison/docs reqs (#2199)	2 years ago