GenerationChunk Class — langchain Architecture

Source Code

libs/core/langchain_core/outputs/generation.py lines 55–80

class GenerationChunk(Generation):
    """`GenerationChunk`, which can be concatenated with other `Generation` chunks."""

    def __add__(self, other: GenerationChunk) -> GenerationChunk:
        """Concatenate two `GenerationChunk` objects.

        Args:
            other: Another `GenerationChunk` to concatenate with.

        Raises:
            TypeError: If other is not a `GenerationChunk`.

        Returns:
            A new `GenerationChunk` concatenated from self and other.
        """
        if isinstance(other, GenerationChunk):
            generation_info = merge_dicts(
                self.generation_info or {},
                other.generation_info or {},
            )
            return GenerationChunk(
                text=self.text + other.text,
                generation_info=generation_info or None,
            )
        msg = f"unsupported operand type(s) for +: '{type(self)}' and '{type(other)}'"
        raise TypeError(msg)