python 文件夾遞歸遍歷查找需要文件

import os
import shutil
class FileAssist(object):
    def __init__(self):
        self.newpath="F:\\img\\"#需要保存路徑

    def getfiles(self,ospath):
        try:
            files = os.listdir(ospath)
            for f in files:
                mypath = os.path.join(ospath, f)
                # print(mypath)
                if os.path.isfile(mypath):
                    ext = os.path.splitext(mypath)
                    if ext[1] == '.jpg' or ext[1] == '.png' or  ext[1] == '.bmp':#指定文件類型
                        z = os.path.getsize(mypath)
                        if (z > 1000000):
                            shutil.copyfile(mypath,self.newpath+f)#復制到指定文件夾下
                            print(mypath)
                            print(z)
                if os.path.isdir(mypath):
                    # print('heihei'+mypath)
                    self.getfiles(mypath)#遞歸
        except  Exception as e :
            print(str(e))
#測試
# f=FileAssist()
# f.getfiles("E:\\")
# print(files)