Python簡單計算文件夾大小的方法

import os, re 
"""
查看文件夾下的所有文件及文件夾 join為拼接函數
"""
def Look_File(path):
 for root , dirs, files in os.walk(path, True):
 print root #主目錄
 for item in files: #主目錄下的文件夾
 print os.path.join(root, item)
"""
計算文件夾 大小
""" 
def FileSize(path):
 size = 0L
 for root , dirs, files in os.walk(path, True):
 size += sum([os.path.getsize(os.path.join(root, name)) for name in files])
 #目錄下文件大小累加
 return size
if __name__ == '__main__':
 Look_File("f:\a")
 print FileSize("f:\a")