计算文件大小

#-*- coding:cp936 -*-
import os, re 
"""
查看文件夹下的所有文件及文件夹  join为拼接函数
"""
def Look_File(path):
	for root , dirs, files in os.walk(path, True):
		print root          #主目录
		for item in files:  #主目录下的文件夹
			print os.path.join(root, item)
		
"""
计算文件夹 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])   #目录下文件大小累加
		return size
	
		
if __name__ == '__main__':
	Look_File("f:\\a")
	print FileSize("f:\\a")