新手学Python 删除指定目录下的所有文件

#!/usr/bin/python
# Filename: BBSIG_ALL.py
import os
import shutil
##################
def delete_files(dir):
    '''delete files under the dir'''
    if os.path.isdir(dir):
        for item in os.listdir(dir):
            os.remove(dir + os.sep + item)
    else:
       print('this is not a direct!')
##################