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NoOutputParser Class — langchain Architecture

Architecture documentation for the NoOutputParser class in chain_extract.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  e19501e2_a888_d99b_5e13_63a5357fb80e["NoOutputParser"]
  0eb98ce3_194e_b222_d9bd_d9a220621a2c["chain_extract.py"]
  e19501e2_a888_d99b_5e13_63a5357fb80e -->|defined in| 0eb98ce3_194e_b222_d9bd_d9a220621a2c
  8ab96923_cf2b_711e_3e25_016f3d51202a["parse()"]
  e19501e2_a888_d99b_5e13_63a5357fb80e -->|method| 8ab96923_cf2b_711e_3e25_016f3d51202a

Relationship Graph

Source Code

libs/langchain/langchain_classic/retrievers/document_compressors/chain_extract.py lines 28–38

class NoOutputParser(BaseOutputParser[str]):
    """Parse outputs that could return a null string of some sort."""

    no_output_str: str = "NO_OUTPUT"

    @override
    def parse(self, text: str) -> str:
        cleaned_text = text.strip()
        if cleaned_text == self.no_output_str:
            return ""
        return cleaned_text

Defined In

Source

Frequently Asked Questions

What is the NoOutputParser class?
NoOutputParser is a class in the langchain codebase, defined in libs/langchain/langchain_classic/retrievers/document_compressors/chain_extract.py.
Where is NoOutputParser defined?
NoOutputParser is defined in libs/langchain/langchain_classic/retrievers/document_compressors/chain_extract.py at line 28.

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