Inter process signalling

[Dale Strickland-Clark]

In Linux this is easy with 'signal' and 'kill' but how can I get one Python
process to signal another (possibly running as a service)? 

All I need is a simple prod with no other data being sent and none being
returned - except that the signal was delivered.

Receiving a signal should generate an interrupt. I'm not looking for a
solution the involves polling.

Thanks
-- 
Dale Strickland-Clark
Riverhall Systems www.riverhall.co.uk