python在多线程用cv2的imshow显示不出窗口的问题

Question

代码如下，运行之后第一次可以显示图片，关闭之后再打开就显示不了了，但从打印信息来看是可以运行显示的线程的

import cv2
import numpy as np
import threading
from easygui import *
img1 = cv2.imread('01.png')
img2 = cv2.imread('02.png')
img_show=[True]
def img1_method():
    print('打开img1')
    while img_show[0]:
       cv2.imshow("img1",img1)
       cv2.waitKey(5)
    print('关闭img1')
def img2_method():
    print('打开img2')
    while img_show[0]:
       cv2.imshow("img2",img2)
       cv2.waitKey(5)
    print('关闭img2')
def open_close():
    while True:
        choices = ['[1]打开', '[2]关闭', '[3]退出']
        choice=buttonbox(msg='请选择', title='cv2测试', choices=choices,
                  default_choice=choices[2], cancel_choice=choices[2], callback=None, run=True)
        choose=choices.index(choice)+1
        if choose==1:
            img_show[0]=True
            threading.Thread(target=img1_method).start()
            threading.Thread(target=img2_method).start()
        elif choose==2:
            img_show[0]=False
        else:
            break

threading.Thread(target=img1_method).start()
threading.Thread(target=img2_method).start()
threading.Thread(target=open_close).start()

Answer 1

已解决