多个文件夹里的内容合并到一个文件，并重命名为固定位数

多个文件夹里的内容合并到一个文件，并重命名为固定位数

import os,shutil
path='源路径'
topath="目标路径"
n=0
for root,dir,file in os.walk(path,topdown="False"):
    if len(file)!=0:
        for filename in file:
            shutil.copyfile(os.path.join(root,filename),os.path.join(topath,filename))
            n=n+1
            if n%10000==1:
                print(n)

filelist = os.listdir(topath)
total_num = len(filelist)
i = 0
for item in filelist:
    if item.endswith('.jpeg'):

        src = os.path.join(os.path.abspath(topath), item)
        dst = os.path.join(os.path.abspath(topath), '' + str(i) + '.jpeg')
        try:
            os.rename(src, dst)
            i = i + 1
        except:
            continue

for file in os.listdir(topath):
    name = file.split('.')[0]
    os.rename(os.path.join(topath, file), os.path.join(topath, '%09d' % int(name) + ".jpg"))#9位，不足补0
print('finish!!')