Parsing Outputs with LangChain

LLMs typically output a string of text. However, when creating an LLM-powered application, we might need a more structured, formatted output that delivers concise information instead of requiring us to read the complete response.

Output parsers

Parsers are a tool that can help us get a structured output. If we don’t use parsers for our responses, then the expected output will be plain text as a string. LangChain provides us with different types of parsers. All parsers take either a string or a Message as input.

The output depends on the type of parser being used. Let’s explore them: