围绕Matplotlib上一个更大的圆的圆周旋转？

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
from matplotlib.patches import Circle

fig, ax = plt.subplots()

# 创建一个大圆
circle = Circle((0, 0), 5, edgecolor='black', facecolor='none')
ax.add_patch(circle)

# 创建一个小圆
small_circle = Circle((0, 0), 1, edgecolor='red', facecolor='red')
ax.add_patch(small_circle)

def init():
    return small_circle,

def update(frame):
    # 计算小圆的新位置
    angle = np.deg2rad(frame)  # 将角度转换为弧度
    x = 5 * np.cos(angle)  # 大圆半径为5
    y = 5 * np.sin(angle)
    small_circle.center = (x, y)
    return small_circle,

# 创建动画
ani = FuncAnimation(fig, update, frames=np.linspace(0, 360, 100),
                    init_func=init, blit=True)

# 显示动画
plt.axis('scaled')
plt.show()