parse() — langchain Function Reference

Architecture documentation for the parse() function in regex.py from the langchain codebase.

Function python OutputParsing StreamingParsers

Entity Profile

OutputParsing→ StreamingParsers→ parse() — langchain Function Reference

Dependency Diagram

graph TD
  d3f9af03_d5d7_b515_1553_90c42c111edf["parse()"]
  10925ecf_0028_c82d_a03e_3d51aac9fdf7["RegexParser"]
  d3f9af03_d5d7_b515_1553_90c42c111edf -->|defined in| 10925ecf_0028_c82d_a03e_3d51aac9fdf7
  style d3f9af03_d5d7_b515_1553_90c42c111edf fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/output_parsers/regex.py lines 29–40

    def parse(self, text: str) -> dict[str, str]:
        """Parse the output of an LLM call."""
        match = re.search(self.regex, text)
        if match:
            return {key: match.group(i + 1) for i, key in enumerate(self.output_keys)}
        if self.default_output_key is None:
            msg = f"Could not parse output: {text}"
            raise ValueError(msg)
        return {
            key: text if key == self.default_output_key else ""
            for key in self.output_keys
        }