How to expand image to fullscreen with Imshow() method

Python
3

@crackwitz, thanks a lot for your reply, but not sure that I do it well, because nothing happen.
Following is what I did :
cv2.namedWindow(“image”, cv2.WND_PROP_FULLSCREEN)
cv2.setWindowProperty(“image”, cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_NORMAL)
key = cv2.waitKey(1)
cv2.imshow(“image”, image)

Window is fullscreen, but the displayed image inside still occupied partially the window rather than using the full space of the window.