通过实例学习python三引号制作doc文档

#!/usr/bin/python
# -*- coding: UTF-8 -*-

# 三引号制作doc文档
class Help:
    '''
 This is a program for backup mysql.
 It used for mysqlhotcopy.
 If you have a ramdisk, you can use it.
 And it will make your system!
'''
    def Usage():
        '''
Usage: backup [-P] [-L] [-h] [--local]

    -P --passwd     change your password.
    -L --local     backup database to local disk.
    -h --help     print this help message.
'''
       
print Help.__doc__
print Help.Usage.__doc__