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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
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file_management	Add Other File Utilities (#3209)	1 year ago
openapi	Add Request body (#2507)	1 year ago
powerbi	power bi api wrapper integration tests & bug fix (#4983)	1 year ago
python	Improved query, print & exception handling in REPL Tool (#4997)	1 year ago
requests	tools refactor (#2961)	1 year ago
shell	Accept str or list[str] for shell (#4060)	1 year ago
__init__.py	Add a SQL agent for interacting with SQL Databases and JSON Agent for interacting with large JSON blobs (#1150)	1 year ago
test_base.py	Add ToolException that a tool can throw. (#5050)	1 year ago
test_exported.py	Update some Tools Docs (#3913)	1 year ago
test_json.py	Add a SQL agent for interacting with SQL Databases and JSON Agent for interacting with large JSON blobs (#1150)	1 year ago
test_public_api.py	Add AzureCognitiveServicesToolkit to call Azure Cognitive Services API (#5012)	1 year ago
test_signatures.py	Pass parsed inputs through to tool _run (#4309)	1 year ago
test_zapier.py	Allow custom base Zapier prompt (#4213)	1 year ago