python cv2批量灰度图片并保存

import cv2
#循环灰度图片并保存
def grayImg():
    for x in range(1,38):
        #读取图片
        img = cv2.imread("C:\\Users\\lyl\\Desktop\\new_dahuoji\\img2\\{}.jpg".format(str(x)))
        GrayImage=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
        #保存灰度后的新图片
        cv2.imwrite("C:\\Users\\lyl\\Desktop\\1\\myProject\\pictures\\dataset2\\dahuomiao\\{}.jpg".format(str(x)),GrayImage)
grayImg()