LangChain Reference home page

GitHub
Main Docs

Overview
Agents
Middleware
Models
Messages
Tools
Embeddings

MCP Adapters

Standard Tests

Text Splitters

⌘I

LangChain Assistant

Ask a question to get started

Enter to send•Shift+Enter new line

Menu

Overview Agents Middleware Models Messages Tools Embeddings

Language

Theme

Pythonlangchainagentsmiddlewaretool_selectionLLMToolSelectorMiddlewareon_parsing_failure

Attribute●Since v1.3

on_parsing_failure

Copy

on_parsing_failure = on_parsing_failure

View source on GitHub