python基础学习-5

使用python作一个简单的备份

#!/usr/bin/env python
# Filename: backup_ver1.py

import os
import time

# 1. 备份的目录及文件列表
source=['./src/1.txt','./src/2.txt']
# If you are using Windows, use source=[r'C:\Documents',r'D:\Work'] or something like that

# 2. 备份目标目录
target_dir='./bak/' #Remember to change this to what you will be using

# 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')+'.zip'

# 5. We use the zip command (in Unix/Linux) to put the files in a zip archive
zip_command="zip -qr '%s' %s" %(target,' '.join(source))

# Run the backup
if os.system(zip_command)==0:
    print ('Successful backup to', target)
else:
    print ('Backup FAILED')
结果：
>>> ================================ RESTART ================================
>>> 
Successful backup to ./bak/20130926225932.zip
>>>

python---类
使用class name：定义一个类
类方法 比普通函数多一个self参数，由类自动传入，不需要手动传入
__init__ 类的构造函数

类的继承,父类由括号包含起来
class child(parent):
父类的constructor函数不会被子类自动调用，需要显式的调用。