AttributeError：'module'对象没有属性'destroyALLWindows'

Question

当我运行以下代码片段时，我目前在python2.7.14和opencv3.2.0下使用Win10。

import numpy as np
import cv2

img = cv2.imread('messi5.jpg',0)
cv2.imshow('image',img)
k = cv2.waitKey(0)
if k == 27:         # wait for ESC key to exit
    cv2.destroyALLWindows()
elif k == ord('s'): # wait for 's' key to save and exit 
    cv2.imwrite('messigray.png',img)
    cv2.destroyALLWindows()

Answer 1

我犯了一个愚蠢的错误！我把AllWindows误认为是ALLWindows ......