source: doc/papers/concurrency/examples/ProdCons.py@ 1a3040c

def Prod( N ):
        cons = (yield)              # get cons
        yield                       # resume scheduler
        for i in range( N ):
                print( "prod" )
                yield cons              # execute next
        print( "end", "prod" )

def Cons( N ):
        prod = (yield)              # get prod
        yield                       # resume scheduler
        for i in range( N ):
                print( "cons" )
                yield prod              # execute next
        print( "end", "cons" )

def Scheduler():
        n = (yield)                 # starting coroutine
        while True:
                n = next( n )           # schedule coroutine

prod = Prod( 5 )
cons = Cons( 5 )
next( prod )                    # prime
prod.send( cons )               # send cons
next( cons )                    # prime
cons.send( prod )               # send prod

s = Scheduler();
next( s )                       # prime
try:
        s.send( prod )                          # start cycle
except StopIteration:
        print( "scheduler stop" )
print( "stop" )

# Local Variables: #
# tab-width: 4 #
# compile-command: "python3.5 ProdCons.py" #
# End: #