Coroutines in Python

coroutines.py

# Simple Generators
# http://www.python.org/dev/peps/pep-0255/
def producer():
    a, b = 0, 1
    while True:
        a, b = b, a + b
        yield a

def pull():
    p = producer()
    for _ in range(10):
        a = p.next()  # pull
        print a

pull()


# Coroutines via Enhanced Generators
# http://www.python.org/dev/peps/pep-0342/
def push():
    c = consumer()
    c.next()
    a, b = 0, 1
    for _ in range(10):
        a, b = b, a + b
        c.send(a)  # push

def consumer():
    while True:
        a = yield
        print a

push()