update from Atlas

attic/control/demo_coro.py

@@ -0,0 +1,24 @@
+>>> def coro():
+...     print 'iniciando corotina...'
+...     while True:
+...         x = yield
+...         print 'recebido: ', x
+...         if x == -1: break
+...     print 'terminando corotina.'
+...
+>>> c = coro()
+>>> next(c)
+iniciando corotina...
+>>> c.send(7)
+recebido:  7
+>>> c.send(3)
+recebido:  3
+>>> c.send(10)
+recebido:  10
+>>> c.send(-1)
+recebido:  -1
+terminando corotina.
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+StopIteration
+>>>