from shutil import copyfile
from sys import exit
import re
import time
import os


def getAllFiles(targetDir):
    files = []
    listFiles = os.listdir(targetDir)
    for i in range(0, len(listFiles)):
        path = os.path.join(targetDir, listFiles[i])
        if os.path.isdir(path):
            files.extend(getAllFiles(path))
        elif os.path.isfile(path):
            files.append(path)
    return files
files = getAllFiles("E:\\anran_mail\\source_files\\allen-p")

for line in files:
    line = line.strip()
    old_name = line
    line = line.split('\\')
    print(line)
    new_name = line[-2]+line[-1]
    print(new_name)
    line = str(line)
    copyfile(old_name,"E:\\anran_mail\\mails\\"+str(new_name))
 

截图：