Python 暂停程序上的matplotlib动画开始

当程序启动时，我想打开一个带有动画的窗口，但它必须从一开始就暂停.

我试着从https://matplotlib.org/stable/gallery/animation/pause_resume.html开始编辑这个例子.

from matplotlib import pyplot as plt

import matplotlib.animation as animation

import numpy as np



class PauseAnimation:
    def __init__(self):
        fig, ax = plt.subplots()

        x = np.linspace(-0.1, 0.1, 1000)

        # Start with a normal distribution
        self.n0 = (1.0 / ((4 * np.pi * 2e-4 * 0.1) ** 0.5) * np.exp(-x ** 2 / (4 * 2e-4 * 0.1)))
        self.p, = ax.plot(x, self.n0)

        self.animation = animation.FuncAnimation(fig, self.update, frames=200, interval=50, blit=True)

        self.animation.pause()  # not working
        self.animation.event_source.stop()  # not working

        self.paused = True

        fig.canvas.mpl_connect('button_press_event', self.toggle_pause)

    def toggle_pause(self, *args, **kwargs):
        if self.paused:
            self.animation.resume()
        else:
            self.animation.pause()
        self.paused = not self.paused

    def update(self, i):
        self.n0 += i / 100 % 5
        self.p.set_ydata(self.n0 % 20)
        return self.p,


pa = PauseAnimation()
plt.show()

我加了self.animation.pause()和self.animation.event_source.stop()，但似乎没有效果，动画还在播放.我如何才能实现这一点？