在训练时如何给图片顺序排序 --Python

import os

path = "C:/Users/Desktop/coco/person/val2017" #图片路径
filelist = os.listdir(path)
count = 0#从0开始
for file in filelist:
    print(file)
for file in filelist:
    Olddir = os.path.join(path, file)
    if os.path.isdir(Olddir):
        continue
    filename = os.path.splitext(file)[0]
    filetype = os.path.splitext(file)[1]
    Newdir = os.path.join(path, str(count).zfill(7) + filetype)#7位，0000000开始
    os.rename(Olddir, Newdir)

    count += 1 #加1