python yield 另外一种用法

 

In [6]: def return_non():  
    print '-----------'  
   ...:     while True:  
   ...:         print '##############'  
   ...:         x = yield  
   ...:         print x  
   ...:         print '%%%%%%%%%%%%'  
   ...:   
  
  
In [8]: y = return_non()  
  
In [9]: y  
Out[9]: <generator object return_non at 0xb72ee8ec>  
  
In [10]: y.next()  
-----------  
##############  
  
In [11]: y.send('hello world')  
hello world  
%%%%%%%%%%%%  
##############  
  
In [12]: y.send('i am old')  
i am old  
%%%%%%%%%%%%  
##############  
  
In [13]: y  
Out[13]: <generator object return_non at 0xb72ee8ec>