example.py

import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
import random
from dataclasses import dataclass


@dataclass
class Data():
    x: list[int]
    y: list[int]
    i: int


def mutate(data: Data):
    data.x.append(data.i)
    data.y.append(random.randint(1, 10))


def animate(i, *fargs):
    data: Data = fargs[0]
    plt.cla()
    plt.plot(data.x, data.y)
    data.i += 1
    mutate(data)


if __name__ == "__main__":
    fig = plt.figure()
    obj = Data([], [], 0)
    ani = FuncAnimation(fig, animate, interval=700, fargs=(obj,))
    plt.show()