当我将 repeat = True 作为参数时，为什么 FuncAnimation 不重复？

Question

import matplotlib.image as mpimg

import numpy as np

import matplotlib.pyplot as plt

import matplotlib.animation as animation

from matplotlib.widgets import Button

from matplotlib.widgets import Slider

fig = plt.figure()

image_list =  ['downloads/20120831_194836_aia.lev1_euv_12s_4k.jpg', 'downloads/20120831_194936_aia.lev1_euv_12s_4k.jpg', 'downloads/20120831_195036_aia.lev1_euv_12s_4k.jpg']

list = []

for raw_image in image_list:

    image1 = mpimg.imread(raw_image)

    real_image1 = plt.imshow(image1)

    list.append([real_image1])

def update_plot(t):

    print(t)

    return list[t]

anim = animation.FuncAnimation(fig, update_plot, repeat = True, interval=1, blit=False,

                                repeat_delay=200)

plt.show()

我正在尝试使用列表中的 3 个 jpg 图像创建一个 func 动画。程序运行 3 个图像 1 次后，出现错误。当我打印“打印”时，它永远不会重置为 0。

错误：

Traceback (most recent call last):

  File "/Users/jamisenma/opt/anaconda3/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 1194, in _on_timer

    ret = func(*args, **kwargs)

  File "/Users/jamisenma/opt/anaconda3/lib/python3.7/site-packages/matplotlib/animation.py", line 1447, in _step

    still_going = Animation._step(self, *args)

  File "/Users/jamisenma/opt/anaconda3/lib/python3.7/site-packages/matplotlib/animation.py", line 1173, in _step

    self._draw_next_frame(framedata, self._blit)

  File "/Users/jamisenma/opt/anaconda3/lib/python3.7/site-packages/matplotlib/animation.py", line 1192, in _draw_next_frame

    self._draw_frame(framedata)

  File "/Users/jamisenma/opt/anaconda3/lib/python3.7/site-packages/matplotlib/animation.py", line 1755, in _draw_frame

    self._drawn_artists = self._func(framedata, *self._args)

  File "/Users/jamisenma/Library/Application Support/JetBrains/PyCharmCE2020.1/scratches/scratch_59.py", line 19, in update_plot

    return list[t]

IndexError: list index out of range

有谁知道问题是什么？

Answer 1

解决了。我不得不添加frames = len(list)作为参数FuncAnimation

Answer 2

您未能提供预期的MRE，也没有进行预期的初始调试工作。因此，我不能确定。但是，我最大的怀疑是来自的返回update_plot，它使用了一个您未能向我们展示的参数——并将其用作隐藏预定义类型的全局序列的下标。尝试使用这种简单的技术进行调试：def update_plot(t):    print("ENTER update_plot; t =", t, "\n list =", list)    print(t)    return list[t]我希望，就在您失败之前，您会看到这一点t >= len(list)。一般提示：不要为变量提供与内置或预定义名称相同的名称。特别是，改变list.