[openCV/Python] HSV color picker based on openCV

import cv2 as cv
import os
import numpy as np

def getFileList(dir, Filelist, ext=None):
    """
    获取文件夹及其子文件夹中文件列表
    输入 dir：文件夹根目录
    输入 ext: 扩展名
    返回： 文件路径列表
    """
    newDir = dir
    if os.path.isfile(dir):
        if ext is None:
            Filelist.append(dir)
        else:
            if ext in dir[-3:]:
                Filelist.append(dir)

    elif os.path.isdir(dir):
        for s in os.listdir(dir):
            newDir = os.path.join(dir, s)
            getFileList(newDir, Filelist, ext)

    return Filelist
def onmouse(event,x,y,flags,param):
    cv.imshow("img", img)
    if event == cv.EVENT_LBUTTONDBLCLK:
        print("("+str(x)+","+str(y)+")的HSV为"+str(img_hsv[y,x]))


path = "D:\pythonProject18_fakeC++\\task1"
imglist = getFileList(path, [])
for imgpath in imglist:
    img = cv.imread(imgpath)
    img_hsv=cv.cvtColor(img,cv.COLOR_BGR2HSV)
    cv.namedWindow("img")
    cv.setMouseCallback("img", onmouse)
    cv.waitKey(0)
cv.destroyAllWindows()