乱七八糟文件夹替换目标文件

import  os
import shutil
os.chdir(r'C:UserslenovoDesktopsjxallsvg')
goalfile=os.listdir(r'C:UserslenovoDesktopsjxallsvg')
def replace(path):
    namelist=os.listdir(path)
    for name in namelist:
        absolutepath=os.path.join(path,name)
        if os.path.isfile(absolutepath):
            for i in goalfile:
                if i==os.path.basename(absolutepath):
                    print(absolutepath)
                    print(i)
                    print('*'*20)
                    newabsolutepath=absolutepath.rsplit('.')[0]+'_bak'+'.'+absolutepath.rsplit('.')[1]
                    shutil.copy2(i,newabsolutepath)
                    os.remove(absolutepath)
                    os.rename(newabsolutepath,absolutepath)
        elif os.path.isdir(absolutepath):
            replace(absolutepath)
replace( r'C:UserslenovoDesktopsjxmovetrain')