coroutine_simple.py

>>> def co():
...     try:
...         while True:
...             item = yield
...             print('Received:', item)
...     except GeneratorExit:
...         print('Exit.')
...         
...     
... 
>>> g = co()
>>> g
<generator object co at 0x7fd3ce6e7a00>
>>> g.send(None) # Starte Generator.
>>> g.send('Berta')
Received: Berta
>>> g.send('Klaus')
Received: Klaus
>>> g.send('Seb')
Received: Seb
>>> g.send('')
Received: 
>>> g.close() # werfe GeneratorExit innerhalb von co
Exit.
>>>