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()

我正在尝试创建一个func动画，其中包含列表中的3个jpg图像。在程序运行3个图像1次后，它给了我一个错误。当我打印“t”时，它从不重置为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

有人知道问题是什么吗

Answer 1

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

Answer 2

您未能提供到预期的MRE中，并且没有执行预期的初始调试工作。因此，我不能肯定

然而，我最大的怀疑是来自update_plot的返回，它使用了一个您没有向我们展示的参数，并将其作为一个全局序列的下标，该序列隐藏了一个预定义的类型

尝试使用以下简单技术进行调试：

def update_plot(t):
    print("ENTER update_plot; t =", t, "\n list =", list)
    print(t)
    return list[t]

我希望，就在你失败之前，你会看到t >= len(list)

一般提示：不要为变量指定与内置或预定义名称相同的名称。特别是，改变list