如何平滑matplotlib动画？

import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
import numpy as np
from scipy.interpolate import interp1d

# 创建图形对象
fig, ax = plt.subplots()

# 初始化图形对象
line, = ax.plot([], [], 'r')

# 更新函数
def update(frame):
    x = np.linspace(0, 2*np.pi, 100)
    y = np.sin(frame * 0.1 * x)
    
    # 使用插值函数计算平滑的曲线
    f = interp1d(x, y, kind='cubic')
    x_smooth = np.linspace(0, 2*np.pi, 1000)
    y_smooth = f(x_smooth)
    
    # 更新图形对象的属性
    line.set_data(x_smooth, y_smooth)
    
    return line,

# 创建动画对象
animation = FuncAnimation(fig, update, frames=100, interval=50)

# 显示动画
plt.show()