python学习之课后习题

来源：互联网发布：mac 水漾润泽编辑：程序博客网时间：2024/06/09 19:53

编写一个动态备份文件的python脚本：

#!/usr/bin/python#filename :backup_ver2.pyimport osimport timeimport syssource=[]for i in sys.argv:        print i        source.append(i)#source=['/root/python/test.py','/root/python/backup_var1.py']print sourcedel(source[0])print '#######'print sourcetarget_dir='/root/python/'today=target_dir+time.strftime('%Y%m%d')now=time.strftime('%H%M%S')if not os.path.exists(today):        os.mkdir(today)        print 'successfully created directory', todaytarget=today+os.sep+now+'.zip'zip_command="zip -qr '%s' %s" %(target,' '.join(source))#run the backupif os.system(zip_command)==0:        print 'successfully backup to the target',targetelse:        print 'failed backup'

这里利用list的可增可减的特性，进过反复的实验，发现使用sys.argv的方法后会把本身的py脚本也包裹到里面如下：

[root@fsailing1 python]# python backup_ver2.py /root/python/test.py /root/python/while.pybackup_ver2.py/root/python/test.py/root/python/while.py['backup_ver2.py', '/root/python/test.py', '/root/python/while.py']successfully backup to the target /root/python/20120627/203320.zip

所以使用了del的方法进行删除了，这样就会好点儿了。

[root@fsailing1 python]# python backup_ver2.py /root/python/test.py /root/python/while.pybackup_ver2.py/root/python/test.py/root/python/while.py['backup_ver2.py', '/root/python/test.py', '/root/python/while.py']#######['/root/python/test.py', '/root/python/while.py']successfully backup to the target /root/python/20120627/203634.zip