我认为您set_radius每次都可以用来更改圆圈大小：
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
testData = np.random.rand(100,2)-[0.5, 0.5]
fig, ax = plt.subplots()
circle1=plt.Circle(testData[20,:],0,color='r',fill=False, clip_on = False)
ax.add_artist(circle1)
# i is the radius
def animate(i):
#init()
#you don't want to redraw the same dots over and over again, do you?
circle1.set_radius(i)
def init():
sctPlot, = ax.plot(testData[:,0], testData[:,1], ".")
return sctPlot,
ani = animation.FuncAnimation(fig, animate, np.arange(0.4, 2, 0.1), init_func=init,
interval=25, blit=False)
plt.show()
因此，您不必每次都删除和重绘补丁，我认为这样做可能更有效。
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