pathlibとshutilを使ってファイルのコピーとか

payo.py

# -*- coding: utf-8 -*-

import shutil
from pathlib import Path

dst = Path('dst')
lis = open('prior-reedit-sorted.txt').readlines()
for filename in lis:
    d,_,_, f = filename.strip().split('_')
    path = Path(d) / Path('_'+f)
    print(filename[:-1])
    shutil.copyfile(path.as_posix(), (dst / filename[:-1 ]).as_posix())