title: how to communicate two separate python processes?
body: <p>I have two python programs and I want to communicate them. <br />
  Both of them are system services and none of them is forked by parent process.</p>
  
  <p>Is there any way to do this without using sockets? <br />
  (eg by crating some Queue -> serialize it -> deserialize by other process and perform communication; or write on file process id to which perform communication, and then create magic structure which gets process id and send some messages to this process... )</p>
  
  <p>The solution should work on Linux and Windows.</p>