matplotlib 动画期间的异常

Question

这是我第一次在这里发帖。我正在运行这个代码，它是一个 matplotlib（版本 3.2.1）动画示例，所以它应该可以正常工作。

import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
plt.rcParams['animation.ffmpeg_path'] = '/opt/local/bin/ffmpeg'

# First set up the figure, the axis, and the plot element we want to animate
fig = plt.figure()
ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
line, = ax.plot([], [], lw=2)

# initialization function: plot the background of each frame
def init():
    line.set_data([], [])
    return line

# animation function.  This is called sequentially
def animate(i):
    x = np.linspace(0, 2, 1000)
    y = np.sin(2 * np.pi * (x - 0.01 * i))
    line.set_data(x, y)
    return line,

# call the animator.  blit=True means only re-draw the parts that have changed.
anim = animation.FuncAnimation(fig, animate, init_func=init,
                               frames=200, interval=20, blit=True)

# save the animation as an mp4.  This requires ffmpeg or mencoder to be
# installed.  The extra_args ensure that the x264 codec is used, so that
# the video can be embedded in html5.  You may need to adjust this for
# your system: for more information, see
# http://matplotlib.sourceforge.net/api/animation_api.html
anim.save('basic_animation.mp4', fps=30, extra_args=['-vcodec', 'libx264'])

plt.show()

但是，我收到了这个错误：

Traceback（最近一次调用最后一次）： 文件“matplotlib_animation.py”，第 42 行，在 anim.save('basic_animation.mp4', fps=30, extra_args=['-vcodec', 'libx264']) 文件“/home/leonardo/.local/lib/python3.6/site-packages/matplotlib/animation.py”，第 1102 行，保存 alt_writer = next（作家，无） TypeError：“MovieWriterRegistry”对象不是迭代器 /home/leonardo/.local/lib/python3.6/site-packages/matplotlib/backends/backend_gtk3.py:195：警告：尝试删除源 ID 8 时未找到它 GLib.source_remove(self._idle_draw_id)

任何想法将不胜感激。

Answer 1

这是 matplotlib 最新版本中的一个已知错误；它将在下一个版本（#16965）中修复。来自 github issse：https://github.com/matplotlib/matplotlib/issues/17097