getting tut. example to work

[John Forse]

I'm trying some examples from the language ref sections on the site in  
the process of learning some python in 3.0.1. I've tried to run both  
of the samples below ,but the only printout is "generator object chain  
at 0x11f4dc8" whether I use print() or not . How do I use the sample  
to produce the expected printout a b c d e f.
  Thanks
John F
A
def chain(*iterables):
     for it in iterables:
         for element in it:
             print(element)
             yield element

def main():
     chain('abc','def')

main()
B
alternative
import itertools
itertools.chain('abc','def')