如何使用 esc for python 退出 while true 循环

Question

I tried many ways to exit the while true loop, but I can't. My code looks like this.

import time
import cv2
while True:
    print ("Loop working")
    time.sleep(2)
    c = cv2.waitKey(7) % 0x100
    if c == 27 or c == 10:
       break




  

Answer 1

You are using waitkey wrong, try like this:

c = cv2.waitKey(7) & 0xFF
if c == 27 or c == 10:
   break

or simpler:

if cv2.waitKey(7) & 0xFF in [10, 27]:
   break