一个Python备份脚本，Python备份脚本,编写一个Python脚本

一个Python备份脚本，Python备份脚本,编写一个Python脚本

编写一个Python脚本，实现为重要的文件或文件夹在指定的目录下创建备份。

[设计思路][1]将需要备份的文件和目录由一个列表指定，通过传入参数获得并保存到列表中。[2]备份应该保存在主备份目录中。[3]将文件备份成一个压缩文件。[4]每一次备份都根据当前的日期在主备份目录中创建一个子文件夹，而所备份的文件命名为当期的时间保存在这个子文件夹中。[5]压缩命令由本地用户决定。可以使用任何本地的存档压缩命令，只要它有命令行界面就可以了，那样就可以从脚本中传递参数给它。

[参考][1]A Byte of Python, 2005[2]Python Manuals 2.6

    #! /usr/bin/python      # Filename: backup_ver1.py      # 2010-7-12 wcdj      import os      import time      import sys      # 1, The files and directories to be backed up are specified in a list      # source = ['/home/wcdj/my_prog', '/home/wcdj/local_installed']      # The following information is the debug used      print '--------------------------------'      source=[]      print 'The command line arguments are: '      for i in sys.argv:          print i          if i == sys.argv[0]:              continue          source.append(i)      print source      print '--------------------------------'      # check input, if error app exit      if len(source) == 0:          print '''''You should input the files or directories, like     python backup_ver1.py /home/wcdj/myfile /home/wcdj/mydir ...'''          exit()      else:          print 'Some files or directorier will be saved into .tar.gz format: '          print source      # If you are using Windows, use       # source=[r'c:/Documents', r'd:/work'] or       # source=['c://Documents', 'd://work'] or       # something like that      # 2, The backup must be stored in a main backup directory      # Remember to change this to what you will be using      target_dir = '/home/wcdj/backup/'      # 3, The files are backed up into a tar file      # 4, The name of subdirectory and tar file      today = target_dir + time.strftime('%Y%m%d')      now = time.strftime('%H%M%S')      # Take a comment from the user to create the name of the tar file      comment = raw_input('Enter a comment: ')      if len(comment) == 0:# check if a comment was entered          target = today + os.sep + now + '.tar.gz'      else:          target = today + os.sep + now + '_' + /          comment.replace(' ', '_') + '.tar.gz'      #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 tar command(in Unix/Linux) to put the files in a tgz archive      tar_command = "tar -zcf %s %s" % (target, ' '.join(source))      # Run the backup      if os.system(tar_command) == 0:          print 'Successful backup to', target      else:          print 'Backup failed'      # end