Using python matplotlib and opencv cv2 imshow in the same loop using the keyboard to trigger pause or run

matplotlib_AND_opencv_imshow.py

import cv2
from matplotlib import pyplot as plt

. . .

    #DO PYTHON MATPLOTLIB IMAGE DISPLAY
    plt.imshow(image_seg)
    plt.draw()
    plt.show()  # , plt.draw(), plt.show()
    plt.pause(0.01)
    #DO OPENCV IMSHOW IMAGE DISPLAY
    cv2.imshow("video", frame)
    #key handling
    k = cv2.waitKey(wait_key) & 0xff
    if chr(k) == 'r':  #start running
        wait_key = 30
    elif chr(k) == 'p':  #pause between frames
        wait_key = 0
    elif k == 27:  #end processing
        break
    else:
        k = 0

Now you can use either and step though them in an OpenCv manner or just "r" for run, "p" for pause, "esc" for quit