gradio-app--gradio/gradio/components/fallback.py

from gradio.components.base import Component
from gradio.events import Events


class Fallback(Component):
    EVENTS = [Events.change]

    def preprocess(self, payload):
        """
        This docstring is used to generate the docs for this custom component.
        Parameters:
            payload: the data to be preprocessed, sent from the frontend
        Returns:
            the data after preprocessing, sent to the user's function in the backend
        """
        return payload

    def postprocess(self, value):
        """
        This docstring is used to generate the docs for this custom component.
        Parameters:
            payload: the data to be postprocessed, sent from the user's function in the backend
        Returns:
            the data after postprocessing, sent to the frontend
        """
        return value

    def example_payload(self):
        return {"foo": "bar"}

    def example_value(self):
        return {"foo": "bar"}

    def api_info(self):
        return {"type": {}, "description": "any valid json"}