electron-python-example | Electron as GUI of Python Applications | Dektop Application library

If you're thinking of using ZeroMQ, you are entering into the world of Actor model programming. In actor model programming, sending a message happens independently of receiving that message (the two activities are asynchronous).

What ZeroMQ means by Blocking

When ZeroMQ talks about a send "blocking", what that means is that the internal buffer ZeroMQ uses to queue up messages prior to transmission is full, so it blocks the sending application until there is space available in this queue. The thing that empties the queue is the successful transfer of earlier messages to the receiver, which has a receive buffer, which has to be emptied by the recieve application. The thing that actually transfers the messages is the mamangement thread(s) that belong to the ZeroMQ contenxt.

This management thread is the cruicial part; it's running independently of your own application threads, and so it's making the communications between sender and receiver asynchronous.

What you likely want is to use ZeroMQ's reactor, zmq_poll(). Typically in actor model programming you have a loop, and at the top is a call to the reactor (zmq_poll() in this case). Zmq_poll() tells you when something has happened, but here you'd primarily be interested in it telling you that a message has arrived. Typically then you'd read that message, process it (which may involve sending out other ZeroMQ messages), and looping back to the zmq_poll().

Backend

So your backend would be something like: