def consumer(): 
  r = '' 
  while True: 
    n = yield r 
    if not n: 
      return 
    print('[CONSUMER] Consuming %s...' % n) 
    r = '200 OK' 
 
def produce(c): 
  c.send(None) 
  n = 0 
  while n < 5: 
    n = n + 1 
    print('[PRODUCER] Producing %s...' % n) 
    r = c.send(n) 
    print('[PRODUCER] Consumer return: %s' % r) 
  c.close() 
                                                            

In [31]: c=consumer()                                                      

In [32]: c.send(None)                                                      
Out[32]: ''

In [33]: c.send(1)                                                       
[CONSUMER] Consuming 1...
Out[33]: '200 OK'

In [34]: c.send(2)                                                       
[CONSUMER] Consuming 2...
Out[34]: '200 OK'