set_text() — langchain Function Reference

Architecture documentation for the set_text() function in chat_generation.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

LangChainCore→ LanguageModelBase→ set_text() — langchain Function Reference

Dependency Diagram

graph TD
  2f40f76f_3158_b30f_1232_ac432f0b8e8f["set_text()"]
  2bdc4d81_5592_3e8d_1079_4eb50790f1d0["ChatGeneration"]
  2f40f76f_3158_b30f_1232_ac432f0b8e8f -->|defined in| 2bdc4d81_5592_3e8d_1079_4eb50790f1d0
  style 2f40f76f_3158_b30f_1232_ac432f0b8e8f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/outputs/chat_generation.py lines 45–73

    def set_text(self) -> Self:
        """Set the text attribute to be the contents of the message.

        Args:
            values: The values of the object.

        Returns:
            The values of the object with the text attribute set.

        Raises:
            ValueError: If the message is not a string or a list.
        """
        text = ""
        if isinstance(self.message.content, str):
            text = self.message.content
        # Extracts first text block from content blocks.
        # Skips blocks with explicit non-text type (e.g., thinking, reasoning).
        elif isinstance(self.message.content, list):
            for block in self.message.content:
                if isinstance(block, str):
                    text = block
                    break
                if isinstance(block, dict) and "text" in block:
                    block_type = block.get("type")
                    if block_type is None or block_type == "text":
                        text = block["text"]
                        break
        self.text = text
        return self