windows 下python程序调用rar命令

[Kunz_sunningup]

我仿照写了个备份python，在网上找了很多方法但仍不成功：
#!/usr/bin/python
# Filename: backup_ver1.py

import os
import time

# 1. The files and directories to be backed up are specified in a list.
source = r'D:\doc\doc'
# If you are using Windows,
# use source = [r'C:\Documents', r'D:\Work'] or something like that

# 2. The backup must be stored in a main backup directory
##target_dir = '/mnt/e/backup/' # Remember to change this to what you will be using
target_dir = 'D:\\backup\\'

# 3. The files are backed up into a zip file.
# 4. The name of the zip archive is the current date and time
target = target_dir + time.strftime('%Y%m%d%H%M%S') + '.rar'

# 5. We use the zip command (in Unix/Linux) to put the files in a zip archive
rar_command = r'"C:\Program Files\WinRAR\WinRAR.exe" a %s %s -r' % (target,source)

# Run the backup
print '\nRun the backup:',
print rar_command+'\n'
if os.system(rar_command) == 0:
print 'Successful backup to', target
else:
print 'Backup FAILED'

将target_dir = 'D:\\backup\\'这一行改为target_dir = 'D:\\backup' 可以运行成功，但文件路径就不是D:\backup\time 而是成为D:\backuptime
而且根本找不到备份好的文件。
求大神指导！！

[Kunz_sunningup]

怎么没人啊！！求大神啊！！！

[CDSoftwareWj]

这句

target = target_dir + time.strftime('%Y%m%d%H%M%S') + '.rar'

改为：

target = os.path.normpath('%s/%s.rar' % (target_dir , time.strftime('%Y%m%d%H%M%S')))

[chuifengde]

3.6下测试没问题，你单步调试一下看看

[Kunz_sunningup]

引用 3 楼 CDSoftwareWj 的回复:

这句

target = target_dir + time.strftime('%Y%m%d%H%M%S') + '.rar'

改为：

target = os.path.normpath('%s/%s.rar' % (target_dir , time.strftime('%Y%m%d%H%M%S')))

我改了以后，都不调用rar.exe了，直接输出Backup failed

[CDSoftwareWj]

你调试一下 看看target改完以后的值，程序你都写出来了，看看值你就知道问题出在那里了

[XNLBcx]

将target_dir = 'D:\\backup\\'改为target_dir = 'D:\\backup'
再将target = target_dir + time.strftime('%Y%m%d%H%M%S') + '.rar'改为target = target_dir + os.sep + time.strftime('%Y%m%d%H%M%S') + '.rar'
试试看呢。