Example of using a dataclass with Gradio

gradio.py

import numpy as np
from dataclasses import dataclass

import gradio as gr


@dataclass
class A:
    x: int
    y: int
    z: np.ndarray


def update_dropdown(a: A):
    return a.x + a.y


with gr.Blocks() as demo:
    a = gr.State(A(1, 2, np.zeros(3)))
    dropdown = gr.Dropdown(choices=["a", "b", "c"], label="Select a letter")
    result = gr.Number(label="Number")
    dropdown.input(update_dropdown, inputs=[a], outputs=[result])

if __name__ == "__main__":
    demo.launch()