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我想使用FuncAnimation和circle.set_radius（）來製作一個擴展圓的動畫。但是，僅當blit = False時，動畫才起作用。其代碼如下：Matplotlib FuncAnimation，blit = true時出錯。
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)
它返回此錯誤：
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。當我改變blit = False時，動畫將起作用。但是，只要我移動鼠標，動畫就會減慢。這是有問題的，因爲我有一個單獨的線程生成聲音輸出。在實踐中，圈子會碰到一些數據點併發出聲音。結果他們不同步。請幫忙。