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我想使用FuncAnimation和circle.set_radius（）来制作一个扩展圆的动画。但是，仅当blit = False时，动画才起作用。其代码如下：Matplotlib FuncAnimation，blit = true时出错。
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import animation
fig, ax = plt.subplots()
plt.grid(True)
plt.axis([-0.6, 0.6, -0.6, 0.6])
circle1= plt.Circle([0,0],0.01,color="0.",fill=False, clip_on = True)
ax.add_patch(circle1)
dt = 1.0/20
vel = 0.1
def init():
circle1.set_radius(0.01)
def animate(i):
global dt, vel
r = vel * i * dt
circle1.set_radius(r)
return circle1,
anim = animation.FuncAnimation(fig, animate, init_func=init,
frames=200, interval= 50, blit=True)
它返回此错误：
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/matplotlib/figure.py", line 1139, in draw
self.canvas.draw_event(renderer)
File "/usr/local/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 1809, in draw_event
self.callbacks.process(s, event)
File "/usr/local/lib/python2.7/site-packages/matplotlib/cbook.py", line 562, in process
proxy(*args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/matplotlib/cbook.py", line 429, in __call__
return mtd(*args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/matplotlib/animation.py", line 620, in _start
self._init_draw()
File "/usr/local/lib/python2.7/site-packages/matplotlib/animation.py", line 1166, in _init_draw
for a in self._drawn_artists:
TypeError: 'NoneType' object is not utterable
我使用Mac OS。当我改变blit = False时，动画将起作用。但是，只要我移动鼠标，动画就会减慢。这是有问题的，因为我有一个单独的线程生成声音输出。在实践中，圈子会碰到一些数据点并发出声音。结果他们不同步。请帮忙。