_convert_to_v1_from_responses() — langchain Function Reference

Source Code

libs/core/langchain_core/messages/block_translators/openai.py lines 652–990

def _convert_to_v1_from_responses(message: AIMessage) -> list[types.ContentBlock]:
    """Convert a Responses message to v1 format."""

    def _iter_blocks() -> Iterator[types.ContentBlock]:
        for raw_block in message.content:
            if not isinstance(raw_block, dict):
                continue
            block = raw_block.copy()
            block_type = block.get("type")

            if block_type == "text":
                if "text" not in block:
                    block["text"] = ""
                if "annotations" in block:
                    block["annotations"] = [
                        _convert_annotation_to_v1(a) for a in block["annotations"]
                    ]
                if "index" in block:
                    block["index"] = f"lc_txt_{block['index']}"
                yield cast("types.TextContentBlock", block)

            elif block_type == "reasoning":
                yield from _explode_reasoning(block)

            elif block_type == "image_generation_call" and (
                result := block.get("result")
            ):
                new_block = {"type": "image", "base64": result}
                if output_format := block.get("output_format"):
                    new_block["mime_type"] = f"image/{output_format}"
                if "id" in block:
                    new_block["id"] = block["id"]
                if "index" in block:
                    new_block["index"] = f"lc_img_{block['index']}"
                for extra_key in (
                    "status",
                    "background",
                    "output_format",
                    "quality",
                    "revised_prompt",
                    "size",
                ):
                    if extra_key in block:
                        if "extras" not in new_block:
                            new_block["extras"] = {}
                        new_block["extras"][extra_key] = block[extra_key]
                yield cast("types.ImageContentBlock", new_block)

            elif block_type == "function_call":
                tool_call_block: (
                    types.ToolCall | types.InvalidToolCall | types.ToolCallChunk | None
                ) = None
                call_id = block.get("call_id", "")

                if (
                    isinstance(message, AIMessageChunk)
                    and len(message.tool_call_chunks) == 1
                    and message.chunk_position != "last"
                ):
                    tool_call_block = message.tool_call_chunks[0].copy()  # type: ignore[assignment]
                elif call_id:
                    for tool_call in message.tool_calls or []:
                        if tool_call.get("id") == call_id:
                            tool_call_block = {
                                "type": "tool_call",
                                "name": tool_call["name"],
                                "args": tool_call["args"],
                                "id": tool_call.get("id"),
                            }
                            break
                    else:
                        for invalid_tool_call in message.invalid_tool_calls or []:
                            if invalid_tool_call.get("id") == call_id:
                                tool_call_block = invalid_tool_call.copy()
                                break
                if tool_call_block:
                    if "id" in block:
                        if "extras" not in tool_call_block:
                            tool_call_block["extras"] = {}
                        tool_call_block["extras"]["item_id"] = block["id"]
                    if "index" in block: