python opencv键盘监听完整版

原文：https://bbs.csdn.net/topics/391993951?page=1

img1 = cv2.imread(a,0)
img2 = cv2.imread(b,0)

for i in range(100):
    cv2.imshow("a",img1)
    waitkey_num = cv2.waitKeyEx()
    if waitkey_num == 2490368:
        print("up")
    if waitkey_num == 2621440:
        print("down")
    if waitkey_num==13:
        print("enter")
    if waitkey_num==32:
        print("space")