_tkinter.TclError: can't invoke “update” command: application has been destroyed error on pyplot.pause()

Question

我正在处理来自 arduino 的串行数据，并使用 opencv2 和 matplotlib 库处理 python 中的数据。一切正常，但每次我关闭图形 window 我都收到错误，而我什至不使用 tkinter 库。

Traceback (most recent call last):
  File "C:\Users\LENOVO\Documents\Arduino\project\coba.py", line 57, in <module>
    plt.pause(0.2)
  File "C:\Users\LENOVO\AppData\Local\Programs\Python\Python38\lib\site-packages\matplotlib\pyplot.py", line 438, in pause
    canvas.start_event_loop(interval)
  File "C:\Users\LENOVO\AppData\Local\Programs\Python\Python38\lib\site-packages\matplotlib\backend_bases.py", line 2407, in start_event_loop
    self.flush_events()
  File "C:\Users\LENOVO\AppData\Local\Programs\Python\Python38\lib\site-packages\matplotlib\backends\_backend_tk.py", line 390, in flush_events
    self._master.update()
  File "C:\Users\LENOVO\AppData\Local\Programs\Python\Python38\lib\tkinter\__init__.py", line 1305, in update
    self.tk.call('update')
_tkinter.TclError: can't invoke "update" command: application has been destroyed

我什至没有声明 tkinter 库，

import cv2
import serial
import numpy as np
import matplotlib.pyplot as plt

这里使用 matplotlib 是为了实时并排显示来自摄像头的视频和串行数据输出，当我按下 'q' 时应用程序应该关闭。

#create two subplots
ax1 = plt.subplot(1,2,1)
ax2 = plt.subplot(1,2,2)

#create two image plots
im1 = ax1.imshow(grab_frame(video))
im2 = plt.imshow(cap2)
while True:
        #read from serial
        buffer = port.readline()
        temper = buffer.decode('utf-8')
        temper = temper.reshape(8,8)
        
        #update data
        im1.set_data(grab_frame(video))
        im2.set_data(temper)
        plt.pause(0.2)

        #stopper
        key = cv2.waitKey(1)
        if(key == ord('q')):
                break

plt.show()
video.release()
cv2.destroyAllWindows()

我应该使用 tkinter 库吗？

Answer 1

我已经尝试了一些方法来克服它，但我仍然不知道用 tkinter 完成的地方，但 IMO 是关于我无法关闭程序时它被暂停了。所以，我没有将塞子放在底部，而是放在 plt.pause() 上方。这看起来像这样：

#update data

im1.set_data(grab_frame(video))
im2.set_data(temper)
#stopper
key = cv2.waitKey(1)
if(key == ord('q')):
        break
plt.pause(0.2)

_tkinter.TclError: can't invoke “update” command: application has been destroyed error on pyplot.pause()

_tkinter.TclError: can't invoke “update” command: application has been destroyed error on pyplot.pause()

python

opencv

tkinter

matplotlib

video-processing