--------------python2 IDE中------------------
>>> print 'helo\nme'
helo
me
>>> print 'hello\rme'
hello me
>>> print 'hello\r\nme'
hello
me
>>>
------------------python2命令行中------------------
>>> print 'hello\nme'
hello
me
>>> print 'hello\rme'
mello
>>> print 'hello\r\nme'
hello
me
>>>
-----------------------bash中--------------------
root@bottle-king:~# echo 'hello\nme'
hello\nme
root@bottle-king:~# echo -e 'hello\nme'
hello
me
root@bottle-king:~# echo -e 'hello\rme'
mello