python-正则表达式匹配文件名，将以特定字符串开头的文件删除，并记录txt格式删除日志

#!/usr/bin/python
# -*- coding: utf-8 -*-

import os
import re
import shutil
 
def  delete_file(pos):
    pos = str(pos)
    os.system(‘rm /home/*%s*‘  % (pos))
 
def check_flie(filePath,aimfile):
    for i,j,k in os.walk(filePath):
        n = 0
        while n < len(k):
            ret = re.match("core\.*",k[n])  
            if ret:
                isExists=os.path.exists(filePath + ‘//‘ + k[n])
                if not isExists:
                    pass
                else:
                    with open(aimfile, ‘a+‘) as f:
                        f.write(filePath + ‘/‘ + k[n] + ‘      has been delete!!\n‘)
                        f.close
                        delete_file(k[n])
            n = n + 1
        
aimfile = ‘/home/fileDelete_coreLog.txt‘        
filePath = ‘/home‘
check_flie(filePath,aimfile)