删除指定目录下指定的文件（非并发）

# -*- coding:gbk -*-
import os  
import string  
def del_files(dir,topdown=True):  
    for root, dirs, files in os.walk(dir, topdown):  
        for name in files:  
            pathname = os.path.splitext(os.path.join(root, name))  
            if (pathname[1] == ".sql" ):
                os.remove(os.path.join(root, name))  
                print(os.path.join(root,name))

dir = os.getcwd()  
print(dir)  
del_files(dir)          #will delete the self .py file after run !!!-_-  
\#os.removedirs(dir)      #delete the empty directory recursively

并发的程序参考：
http://blog.youkuaiyun.com/zistxym/article/details/74938797