如何在Matplotlib中刷新文本？

import matplotlib.pyplot as plt
import matplotlib.animation as animation

fig, ax = plt.subplots()

text = ax.text(x, y, '初始文本', ha='center', va='center', fontsize=12)

def update_text(i):
    # 更新文本内容
    new_text = '更新后的文本'
    text.set_text(new_text)

ani = animation.FuncAnimation(fig, update_text, frames=range(num_frames), interval=1000)

plt.show()