python读取目录下文件并生成日志

很长的一段代码，但很清楚。哈哈。
import os
from time import strftime
stamp=strftime("%Y-%m-%d %H:%M:%S")
logfile = 'F:\\test\\m-php-framework\\tmp\logs\\error_report.log'
path = 'F:\\test\\'
files = os.listdir(path)
bytes = 0
numfiles = 0
for f in files:
if f.startswith('t'):
info = os.stat(path + f)
numfiles +=1
bytes+=info[6]
if numfiles > 1:
title = 'tiles'
else:
title = 'file'
string = stamp + " -- " + str(numfiles) + " session" +title+","+ str(bytes)+" bytes\n"
file = open(logfile,"a")
file.writelines(string)
file.close()