一段备份文件的python程序(3)

一段备份文件的python程序，一边学习《Python3简明教程(中文版)》一边照猫画虎写的。windows xp下调试通过。

源代码如下：

#!/usr/bin/python
#Filename: backup_ver3.py


# Function: Backup files every day with comments
# Precondition:
# 1. zip tool is installed.
# 2. python is installed.


import os
import time


# 1. The files and directories to be backed up are specified in a list.
source = ['c:\\out\\workspace', 'c:\\tmp']


# 2. The backup must be stored in a main backup directory
target_dir = 'c:\\AuthLog'


# 3. The files are backed up into a zip file.
# 4. The current day is the name of the subdirectory in the main directory
today = target_dir + os.sep + time.strftime('%Y%m%d')
now = time.strftime('%H%M%S')


# Take a comment from the user to create the name of the zip file
comment = input('Enter a comment --> ')
if len(comment) == 0: # check if a comment was entered
  target = today + os.sep + now + '.zip'
else:
  target = today + os.sep + now + '_' + comment.replace(' ', '_') + '.zip'


# Create the subdirectory if it isn't already there
if not os.path.exists(today):
  os.mkdir(today) # make directory
  print('Successfully created directory', today)


# 5. We use the zip command to put the files in a zip archive
delimiter = ' '
zip_command = '"C:\Program Files\WinRAR\WinRAR.exe" a {0} {1}'.format(target, delimiter.join(source))
print(zip_command)


# Run the backup
if os.system(zip_command) == 0:
  print('Successful backup to ', target)
else:
  print('Backup failed')