节点

    self.session.workflow_node.parameter_extractor

    def invoke(
        self,
        parameters: list[ParameterConfig],
        model: ModelConfig,
        query: str,
        instruction: str = "",
    ) -> NodeResponse
        pass

from collections.abc import Generator
from dify_plugin import Tool
from dify_plugin.entities.tool import ToolInvokeMessage
from dify_plugin.entities.workflow_node import ModelConfig, NodeResponse, ParameterConfig


class ParameterExtractorTool(Tool):
    def _invoke(
        self, tool_parameters: dict
    ) -> Generator[ToolInvokeMessage, None, None]:
        response: NodeResponse = self.session.workflow_node.parameter_extractor.invoke(
            parameters=[
                ParameterConfig(
                    name="name",
                    description="name of the person",
                    required=True,
                    type="string",
                )
            ],
            model=ModelConfig(
                provider="langgenius/openai/openai",
                name="gpt-4o-mini",
                completion_params={},
            ),
            query="My name is John Doe",
            instruction="Extract the name of the person",
        )

        extracted_name = response.outputs.get("name", "Name not found")
        yield self.create_text_message(extracted_name)

    self.session.workflow_node.question_classifier

    def invoke(
        self,
        classes: list[ClassConfig],
        model: ModelConfig,
        query: str,
        instruction: str = "",
    ) -> NodeResponse:
        pass