python脚本获取文件的创建于修改日期并计算时间差

由于在计算一个算法的运行时间的时候，需要将文件的创建日期与修改日期读取到，然后计算两者之差，在网上搜索了相关的程序之后，自己又修改了一下，把代码贴在这里，供以后查阅使用，也希望可以帮到其他人。

# -*- coding: utf-8 -*-
"""
Created on Mon Dec 12 14:59:46 2016

@author: shenruixue

to calculate size after filter in conv and pool
"""
import os.path, time
import exceptions
class TypeError (Exception):
  pass
if __name__ == '__main__':
 file_srx = open("train_1920_1080.set")#其中包含所有待计算的文件名
 line = file_srx.readline()
 diff_time_all = 0
 while line:
  f = line[:-1]    # 除去末尾的换行符
  print (f)
  print ('***********************************************************')
  mtime = time.ctime(os.path.getmtime(f))
  ctime = time.ctime(os.path.getctime(f))
  mtime_s = (os.path.getmtime(f))
  ctime_s = (os.path.getctime(f))
  print "Last modified : %s, last created time: %s" % (mtime, ctime)
  diff_time = (int(mtime_s) - int(ctime_s))
  diff_time_all = diff_time_all + diff_time
  print "diff time is ", diff_time
  line = file_srx.readline() 
 print "diff_time_all is ", diff_time_all
 file_object = open('train_1920_1080.txt', 'w')
 file_object.write(str(diff_time_all))
 file_object.close( )