How to broadcast socket

[Jörgen Tapani]

I'm new to Python, and I have achived this
def test():
 s = socket(AF_INET, SOCK_DGRAM)
 s.setsockopt(SOL_SOCKET,SO_BROADCAST,1)
 s.sendto('Broadcast test',INADDR_BROADCAST)
 s.close()

And it do not run!
Help!
Jorgen Tapani