# in stackless python or pypy
def repeat(item):
    i = 0
    while True:
        yield i, item
        i += 1

import pickle
gen = repeat('foo')
print gen.next() # (0, 'foo')
dumped = pickle.dumps(gen)
# and in another machine
gen = pickle.loads(dumped)
print gen.next() # (1, 'foo')